RAF Client API: Access denied: 0

[1/14/13 15:54:10:802 CET] 00000016 APIServerConn W   !!!

com.buildforge.services.common.api.APIException: CRRBF0101I: API: Access denied: 0.
at com.buildforge.services.common.api.APIException.needLevel(APIException.java:386)
at com.buildforge.services.server.api.AuthContext.checkLevel(AuthContext.java:595)
at com.buildforge.services.server.manager.BuildClassManager.create(BuildClassManager.java:99)
at com.buildforge.services.server.manager.BuildClassManager.create(BuildClassManager.java:86)
at com.buildforge.services.server.api.commands.BuildClassCommands.createClass(BuildClassCommands.java:160)
at com.buildforge.services.server.api.commands.BuildClassCommands.invoke(BuildClassCommands.java:99)
at com.buildforge.services.server.api.APICommandProcessor.process(APICommandProcessor.java:290)
at com.buildforge.services.server.api.APIServerConnection.handleRequest(APIServerConnection.java:257)
at com.buildforge.services.server.api.APIServerConnection.process(APIServerConnection.java:171)
at com.buildforge.services.server.dispatch.callback.BufferedConnection.run(BufferedConnection.java:246)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:897)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:919)
at java.lang.Thread.run(Thread.java:772)

Does anybody know this error? Any help is appreciated.

Thanks,
Mirco