Web UI problem: "Error viewing work item (OK)"

When I try to click a work item in a browser (IE6), the message "Error viewing work item (OK)" will pop up.

I also found that when I click the "Work Items" tab, the tomcat console has following message:

-------------------------------------------------------------
15:28:37,250 WARN .team.repository.servlet.AbstractTeam
ServerServlet - IOException processing request for GET com.ibm.team.workitem.co
mmon.internal.model.IImageContentService for: ADMIN - Exception message: null
ClientAbortException: java.net.SocketException: Connection reset by peer: socke
t write error
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:
327)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:29
3)
at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputSt
ream.java:97)
at com.ibm.team.workitem.service.internal.ImageContentService.perform_GE
T(ImageContentService.java:86)
at com.ibm.team.repository.service.TeamRawService.service(TeamRawService
.java:79)
at com.ibm.team.repository.servlet.AbstractTeamServerServlet.doRestServi
ce(AbstractTeamServerServlet.java:624)
at com.ibm.team.repository.servlet.AbstractTeamServerServlet.service(Abs
tractTeamServerServlet.java:1044)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.eclipse.equinox.http.registry.internal.ServletManager$ServletWrap
per.service(ServletManager.java:177)
at org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleR
equest(ServletRegistration.java:91)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(P
roxyServlet.java:110)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyS
ervlet.java:76)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.eclipse.equinox.servletbridge.BridgeServlet.service(BridgeServlet
.java:115)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:524)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p
rocessConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol
lowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
at java.lang.Thread.run(Thread.java:803)
Caused by:
java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:105)
at java.net.SocketOutputStream.write(SocketOutputStream.java:149)
at com.ibm.jsse2.c.a(c.java:91)
at com.ibm.jsse2.c.a(c.java:161)
at com.ibm.jsse2.jc.a(jc.java:224)
at com.ibm.jsse2.j.write(j.java:2)
at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(Internal
OutputBuffer.java:746)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:433)
at org.apache.coyote.http11.InternalOutputBuffer.flush(InternalOutputBuf
fer.java:304)
at org.apache.coyote.http11.Http11Processor.action(Http11Processor.java:
991)
at org.apache.coyote.Response.action(Response.java:182)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:
322)
... 29 more