This error seen when starting build engine

I see the below error when starting the build engine...anyone know why and how I can fix this?

at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(
ServiceInterfaceProxy.java:80)
at $Proxy0.describe(Unknown Source)
at com.ibm.team.repository.client.internal.TeamRepository$4.run(TeamRepo
sitory.java:1219)
at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepo
sitory.java:1061)
at com.ibm.team.repository.common.transport.CancelableCaller.call(Cancel
ableCaller.java:76)
at com.ibm.team.repository.client.internal.TeamRepository.callCancelable
Service(TeamRepository.java:1054)
at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(
TeamRepository.java:1213)
at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepo
sitory.java:480)
at com.ibm.team.build.internal.engine.BuildLoop.getTeamRepository(BuildL
oop.java:688)
at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:1
79)
at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:139
)
at java.lang.Thread.run(Unknown Source)
2008-01-24 21:36:32 Exception occurred in build loop: return code 400 from HTTP
request: Bad Request
com.ibm.team.repository.common.transport.TeamServiceException: return code 400 f
rom HTTP request: Bad Request
at com.ibm.team.repository.transport.client.RemoteTeamService.executeHtt
pMethod(RemoteTeamService.java:612)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeCan
celableHttpMethod(RemoteTeamService.java:462)
at com.ibm.team.repository.transport.client.RemoteTeamService.invokePost
(RemoteTeamService.java:452)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeMet
hod(RemoteTeamService.java:402)
at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(Rem
oteTeamService.java:196)
at com.ibm.team.repository.transport.client.ServiceInvocationHandler.inv
oke(ServiceInvocationHandler.java:43)
at $Proxy0.describe(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeS
erviceCall(ServiceInterfaceProxy.java:145)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(
ServiceInterfaceProxy.java:80)
at $Proxy0.describe(Unknown Source)
at com.ibm.team.repository.client.internal.TeamRepository$4.run(TeamRepo
sitory.java:1219)
at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepo
sitory.java:1061)
at com.ibm.team.repository.common.transport.CancelableCaller.call(Cancel
ableCaller.java:76)
at com.ibm.team.repository.client.internal.TeamRepository.callCancelable
Service(TeamRepository.java:1054)
at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(
TeamRepository.java:1213)
at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepo
sitory.java:480)
at com.ibm.team.build.internal.engine.BuildLoop.getTeamRepository(BuildL
oop.java:688)
at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:1
79)
at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:139
)
at java.lang.Thread.run(Unknown Source)

C:\Program Files\IBM\TeamConcert\buildsystem\buildengine\eclipse>jbe -repository
http://localhost:9080/jazz/ -userId chris -engineId TestBuildEngine -sleepTime
1
2008-01-24 21:38:36 Running build loop...
2008-01-24 21:38:36 Waiting for request...
2008-01-24 21:38:37 Exception occurred in build loop: return code 400 from HTTP
request: Bad Request
com.ibm.team.repository.common.transport.TeamServiceException: return code 400 f
rom HTTP request: Bad Request
at com.ibm.team.repository.transport.client.RemoteTeamService.executeHtt
pMethod(RemoteTeamService.java:612)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeCan
celableHttpMethod(RemoteTeamService.java:462)
at com.ibm.team.repository.transport.client.RemoteTeamService.invokePost
(RemoteTeamService.java:452)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeMet
hod(RemoteTeamService.java:402)
at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(Rem
oteTeamService.java:196)
at com.ibm.team.repository.transport.client.ServiceInvocationHandler.inv
oke(ServiceInvocationHandler.java:43)
at $Proxy0.describe(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeS
erviceCall(ServiceInterfaceProxy.java:145)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(
ServiceInterfaceProxy.java:80)
at $Proxy0.describe(Unknown Source)
at com.ibm.team.repository.client.internal.TeamRepository$4.run(TeamRepo
sitory.java:1219)
at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepo
sitory.java:1061)
at com.ibm.team.repository.common.transport.CancelableCaller.call(Cancel
ableCaller.java:76)
at com.ibm.team.repository.client.internal.TeamRepository.callCancelable
Service(TeamRepository.java:1054)
at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(
TeamRepository.java:1213)
at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepo
sitory.java:480)
at com.ibm.team.build.internal.engine.BuildLoop.getTeamRepository(BuildL
oop.java:688)
at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:1
79)
at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:139
)
at java.lang.Thread.run(Unknown Source)
2008-01-24 21:38:38 Exception occurred in build loop: return code 400 from HTTP
request: Bad Request
com.ibm.team.repository.common.transport.TeamServiceException: return code 400 f
rom HTTP request: Bad Request
at com.ibm.team.repository.transport.client.RemoteTeamService.executeHtt
pMethod(RemoteTeamService.java:612)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeCan
celableHttpMethod(RemoteTeamService.java:462)
at com.ibm.team.repository.transport.client.RemoteTeamService.invokePost
(RemoteTeamService.java:452)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeMet
hod(RemoteTeamService.java:402)
at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(Rem
oteTeamService.java:196)
at com.ibm.team.repository.transport.client.ServiceInvocationHandler.inv
oke(ServiceInvocationHandler.java:43)
at $Proxy0.describe(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeS
erviceCall(ServiceInterfaceProxy.java:145)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(
ServiceInterfaceProxy.java:80)
at $Proxy0.describe(Unknown Source)
at com.ibm.team.repository.client.internal.TeamRepository$4.run(TeamRepo
sitory.java:1219)
at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepo
sitory.java:1061)
at com.ibm.team.repository.common.transport.CancelableCaller.call(Cancel
ableCaller.java:76)
at com.ibm.team.repository.client.internal.TeamRepository.callCancelable
Service(TeamRepository.java:1054)
at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(
TeamRepository.java:1213)
at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepo
sitory.java:480)
at com.ibm.team.build.internal.engine.BuildLoop.getTeamRepository(BuildL
oop.java:688)
at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:1
79)
at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:139
)
at java.lang.Thread.run(Unknown Source)
2008-01-24 21:38:39 Exception occurred in build loop: return code 400 from HTTP
request: Bad Request
com.ibm.team.repository.common.transport.TeamServiceException: return code 400 f
rom HTTP request: Bad Request
at com.ibm.team.repository.transport.client.RemoteTeamService.executeHtt
pMethod(RemoteTeamService.java:612)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeCan
celableHttpMethod(RemoteTeamService.java:462)
at com.ibm.team.repository.transport.client.RemoteTeamService.invokePost
(RemoteTeamService.java:452)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeMet
hod(RemoteTeamService.java:402)
at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(Rem
oteTeamService.java:196)
at com.ibm.team.repository.transport.client.ServiceInvocationHandler.inv
oke(ServiceInvocationHandler.java:43)
at $Proxy0.describe(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeS
erviceCall(ServiceInterfaceProxy.java:145)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(
ServiceInterfaceProxy.java:80)
at $Proxy0.describe(Unknown Source)
at com.ibm.team.repository.client.internal.TeamRepository$4.run(TeamRepo
sitory.java:1219)
at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepo
sitory.java:1061)
at com.ibm.team.repository.common.transport.CancelableCaller.call(Cancel
ableCaller.java:76)
at com.ibm.team.repository.client.internal.TeamRepository.callCancelable
Service(TeamRepository.java:1054)
at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(
TeamRepository.java:1213)
at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepo
sitory.java:480)
at com.ibm.team.build.internal.engine.BuildLoop.getTeamRepository(BuildL
oop.java:688)
at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:1
79)
at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:139
)
at java.lang.Thread.run(Unknown Source)
2008-01-24 21:38:40 Exception occurred in build loop: return code 400 from HTTP
request: Bad Request
com.ibm.team.repository.common.transport.TeamServiceException: return code 400 f
rom HTTP request: Bad Request
at com.ibm.team.repository.transport.client.RemoteTeamService.executeHtt
pMethod(RemoteTeamService.java:612)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeCan
celableHttpMethod(RemoteTeamService.java:462)
at com.ibm.team.repository.transport.client.RemoteTeamService.invokePost
(RemoteTeamService.java:452)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeMet
hod(RemoteTeamService.java:402)
at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(Rem
oteTeamService.java:196)
at com.ibm.team.repository.transport.client.ServiceInvocationHandler.inv
oke(ServiceInvocationHandler.java:43)
at $Proxy0.describe(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeS
erviceCall(ServiceInterfaceProxy.java:145)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(
ServiceInterfaceProxy.java:80)
at $Proxy0.describe(Unknown Source)
at com.ibm.team.repository.client.internal.TeamRepository$4.run(TeamRepo
sitory.java:1219)
at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepo
sitory.java:1061)
at com.ibm.team.repository.common.transport.CancelableCaller.call(Cancel
ableCaller.java:76)
at com.ibm.team.repository.client.internal.TeamRepository.callCancelable
Service(TeamRepository.java:1054)
at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(
TeamRepository.java:1213)
at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepo
sitory.java:480)
at com.ibm.team.build.internal.engine.BuildLoop.getTeamRepository(BuildL
oop.java:688)
at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:1
79)
at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:139
)
at java.lang.Thread.run(Unknown Source)
2008-01-24 21:38:41 Exception occurred in build loop: return code 400 from HTTP
request: Bad Request
com.ibm.team.repository.common.transport.TeamServiceException: return code 400 f
rom HTTP request: Bad Request
at com.ibm.team.repository.transport.client.RemoteTeamService.executeHtt
pMethod(RemoteTeamService.java:612)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeCan
celableHttpMethod(RemoteTeamService.java:462)
at com.ibm.team.repository.transport.client.RemoteTeamService.invokePost
(RemoteTeamService.java:452)
at com.ibm.team.repository.transport.client.RemoteTeamService.executeMet
hod(RemoteTeamService.java:402)
at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(Rem
oteTeamService.java:196)
at com.ibm.team.repository.transport.client.ServiceInvocationHandler.inv
oke(ServiceInvocationHandler.java:43)
at $Proxy0.describe(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeS
erviceCall(ServiceInterfaceProxy.java:145)
at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(
ServiceInterfaceProxy.java:80)
at $Proxy0.describe(Unknown Source)
at com.ibm.team.repository.client.internal.TeamRepository$4.run(TeamRepo
sitory.java:1219)
at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepo
sitory.java:1061)
at com.ibm.team.repository.common.transport.CancelableCaller.call(Cancel
ableCaller.java:76)
at com.ibm.team.repository.client.internal.TeamRepository.callCancelable
Service(TeamRepository.java:1054)
at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(
TeamRepository.java:1213)
at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepo
sitory.java:480)
at com.ibm.team.build.internal.engine.BuildLoop.getTeamRepository(BuildL
oop.java:688)
at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:1
79)
at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:139
)
at java.lang.Thread.run(Unknown Source)

C:\Program Files\IBM\TeamConcert\buildsystem\buildengine\eclipse>