j2ee服务器启动不起来了，求教各位大哥，详细信息请进——〉 (20分)

我在安装j2ee sdk1.3.1后可以启动自带的j2ee服务器。可是今天突然启动不起来了，错误信息如下：
J2EE server listen port: 1050
org.omg.CORBA.INTERNAL: vmcid: SUN minor code: 209 completed: No
at com.sun.corba.ee.internal.iiop.GIOPImpl.createListener(GIOPImpl.java:
256)
at com.sun.corba.ee.internal.iiop.GIOPImpl.getEndpoint(GIOPImpl.java:205
)
at com.sun.corba.ee.internal.iiop.GIOPImpl.initEndpoints(GIOPImpl.java:1
40)
at com.sun.corba.ee.internal.POA.POAORB.getServerEndpoint(POAORB.java:49
2)
at com.sun.corba.ee.internal.POA.POAImpl.pre_initialize(POAImpl.java:156
)
at com.sun.corba.ee.internal.POA.POAImpl.<init>(POAImpl.java:114)
at com.sun.corba.ee.internal.POA.POAORB.makeRootPOA(POAORB.java:114)
at com.sun.corba.ee.internal.POA.POAORB$1.evaluate(POAORB.java:132)
at com.sun.corba.ee.internal.core.Future.evaluate(Future.java:21)
at com.sun.corba.ee.internal.corba.ORB.resolveInitialReference(ORB.java:
2488)
at com.sun.corba.ee.internal.corba.ORB.resolve_initial_references(ORB.ja
va:2423)
at com.sun.enterprise.server.J2EEServer.run(J2EEServer.java:196)
at com.sun.enterprise.server.J2EEServer.main(J2EEServer.java:972)
java.lang.RuntimeException: Unable to create ORB. Possible causes include TCP/IP
ports in use by another process
at com.sun.enterprise.server.J2EEServer.run(J2EEServer.java:206)
at com.sun.enterprise.server.J2EEServer.main(J2EEServer.java:972)
java.lang.RuntimeException: Unable to create ORB. Possible causes include TCP/IP
ports in use by another process
at com.sun.enterprise.server.J2EEServer.run(J2EEServer.java:206)
at com.sun.enterprise.server.J2EEServer.main(J2EEServer.java:972)
java.lang.RuntimeException: Unable to create ORB. Possible causes include TCP/IP
ports in use by another process
at com.sun.enterprise.server.J2EEServer.run(J2EEServer.java:346)
at com.sun.enterprise.server.J2EEServer.main(J2EEServer.java:972)
J2EE server reported the following error: Unable to create ORB. Possible causes
include TCP/IP ports in use by another process
Error executing J2EE server ...
我该怎么解决呢？我更换了orb的端口也不行。谢谢！！

我重新安装sdk后还是同样的错误/