EJB运行出错，望各位大哥帮忙！！！

我部署后，再运行，出现
java.rmi.RemoteException: EJB Exception: ; nested exception is: 
javax.ejb.EJBException: Unable to resolve 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env/ejb/employees' Resolved: 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env' Unresolved:'ejb' Start server side stack trace:
java.rmi.RemoteException: EJB Exception: ; nested exception is: 
javax.ejb.EJBException: Unable to resolve 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env/ejb/employees' Resolved: 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env' Unresolved:'ejb' javax.ejb.EJBException: Unable to resolve 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env/ejb/employees' Resolved: 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env' Unresolved:'ejb'  at weblogictest.EmployeesSessionFacadeBean.setSessionContext(EmployeesSessionFacadeBean.java:32) at weblogictest.EmployeesSessionFacadeBean_3w8wob_Impl.setSessionContext(EmployeesSessionFacadeBean_3w8wob_Impl.java:88) at weblogic.ejb20.manager.StatelessManager.createBean(StatelessManager.java:279) at weblogic.ejb20.pool.StatelessSessionPool.createBean(StatelessSessionPool.java:145) at weblogic.ejb20.pool.StatelessSessionPool.getBean(StatelessSessionPool.java:98) at weblogic.ejb20.manager.StatelessManager.preInvoke(StatelessManager.java:154) at weblogic.ejb20.internal.BaseEJBObject.preInvoke(BaseEJBObject.java:126) at weblogic.ejb20.internal.StatelessEJBObject.preInvoke(StatelessEJBObject.java:61) at weblogictest.EmployeesSessionFacadeBean_3w8wob_EOImpl.employeesFindByPrimaryKey(EmployeesSessionFacadeBean_3w8wob_EOImpl.java:237) at weblogictest.EmployeesSessionFacadeBean_3w8wob_EOImpl_WLSkel.invoke(Unknown Source) at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:346) at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:114) at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:300) at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:762) at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:295) at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)End  server side stack trace
; nested exception is: 
javax.ejb.EJBException: Unable to resolve 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env/ejb/employees' Resolved: 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env' Unresolved:'ejb' Start server side stack trace:
javax.ejb.EJBException: Unable to resolve 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env/ejb/employees' Resolved: 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env' Unresolved:'ejb'  at weblogictest.EmployeesSessionFacadeBean.setSessionContext(EmployeesSessionFacadeBean.java:32) at weblogictest.EmployeesSessionFacadeBean_3w8wob_Impl.setSessionContext(EmployeesSessionFacadeBean_3w8wob_Impl.java:88) at weblogic.ejb20.manager.StatelessManager.createBean(StatelessManager.java:279) at weblogic.ejb20.pool.StatelessSessionPool.createBean(StatelessSessionPool.java:145) at weblogic.ejb20.pool.StatelessSessionPool.getBean(StatelessSessionPool.java:98) at weblogic.ejb20.manager.StatelessManager.preInvoke(StatelessManager.java:154) at weblogic.ejb20.internal.BaseEJBObject.preInvoke(BaseEJBObject.java:126) at weblogic.ejb20.internal.StatelessEJBObject.preInvoke(StatelessEJBObject.java:61) at weblogictest.EmployeesSessionFacadeBean_3w8wob_EOImpl.employeesFindByPrimaryKey(EmployeesSessionFacadeBean_3w8wob_EOImpl.java:237) at weblogictest.EmployeesSessionFacadeBean_3w8wob_EOImpl_WLSkel.invoke(Unknown Source) at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:346) at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:114) at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:300) at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:762) at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:295) at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)End  server side stack trace
javax.ejb.EJBException: Unable to resolve 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env/ejb/employees' Resolved: 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env' Unresolved:'ejb' Start server side stack trace:
javax.ejb.EJBException: Unable to resolve 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env/ejb/employees' Resolved: 'app/ejb/EJBModuleTest.jar#EmployeesSessionFacade/comp/env' Unresolved:'ejb'  at weblogictest.EmployeesSessionFacadeBean.setSessionContext(EmployeesSessionFacadeBean.java:32) at weblogictest.EmployeesSessionFacadeBean_3w8wob_Impl.setSessionContext(EmployeesSessionFacadeBean_3w8wob_Impl.java:88) at weblogic.ejb20.manager.StatelessManager.createBean(StatelessManager.java:279) at weblogic.ejb20.pool.StatelessSessionPool.createBean(StatelessSessionPool.java:145) at weblogic.ejb20.pool.StatelessSessionPool.getBean(StatelessSessionPool.java:98) at weblogic.ejb20.manager.StatelessManager.preInvoke(StatelessManager.java:154) at weblogic.ejb20.internal.BaseEJBObject.preInvoke(BaseEJBObject.java:126) at weblogic.ejb20.internal.StatelessEJBObject.preInvoke(StatelessEJBObject.java:61) at weblogictest.EmployeesSessionFacadeBean_3w8wob_EOImpl.employeesFindByPrimaryKey(EmployeesSessionFacadeBean_3w8wob_EOImpl.java:237) at weblogictest.EmployeesSessionFacadeBean_3w8wob_EOImpl_WLSkel.invoke(Unknown Source) at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:346) at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:114) at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:300) at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:762) at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:295) at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)End  server side stack trace
<<no stack trace available>>
我调试一下，是EmployeesDto e = ed.employeesFindByPrimaryKey(new Integer(1));出错