JBoss4.0调用EJB问题

我今天下了一个JBoss4，用Eclipse+Lomboz开发了一个HelloEJB。。由于Lomboz3.01并没有JBoss4的选项，所以我只是把JBoss3.0的路径改JBoss4的路径,结果成功地把EJB发布到了Jboss4上，在console上也能清楚见到HelloEJB。之后建立一个TestCient测试，出错了：
Exception in thread "main" java.lang.NoClassDefFoundError: EDU/oswego/cs/dl/util/concurrent/ConcurrentReaderHashMap
at org.jboss.mx.loading.LoaderRepository.<init>(LoaderRepository.java:40)
at org.jboss.mx.loading.UnifiedLoaderRepository3.<init>(UnifiedLoaderRepository3.java:52)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at java.lang.Class.newInstance0(Class.java:350)
at java.lang.Class.newInstance(Class.java:303)
at org.jboss.mx.server.MBeanServerImpl.getClassLoaderRepository(MBeanServerImpl.java:1094)
at org.jboss.mx.server.MBeanServerImpl.<init>(MBeanServerImpl.java:184)
at org.jboss.mx.server.MBeanServerBuilderImpl.newMBeanServer(MBeanServerBuilderImpl.java:56)
at javax.management.MBeanServerFactory.newMBeanServer(MBeanServerFactory.java:316)
at javax.management.MBeanServerFactory.createMBeanServer(MBeanServerFactory.java:219)
at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:330)
at org.jboss.system.server.ServerImpl.start(ServerImpl.java:291)
at org.jboss.Main.boot(Main.java:151)
at org.jboss.Main$1.run(Main.java:405)
at java.lang.Thread.run(Thread.java:595)

请问JBoss在使用时要设置些什么呢？？哪位高手指教下？