J2EE Server cannot start

[Tinashe Bothwell Chipomho]

Hi all, still new to enterprise development. I installed my j2ee server and managed to run it a couple of times. when i restarted my pc today i got the following error:    java.lang.RuntimeException: Could not initialize j2ee server. Possible cause could be another instance of the server already running.         at com.sun.enterprise.server.J2EEServer.run(J2EEServer.java:348)         at com.sun.enterprise.server.J2EEServer.main(J2EEServer.java:866) J2EE server reported the following error: Could not initialize j2ee server. Possible cause could be another instance of the server already running. I know very well that no other instance is running coz I have restarted my machine and started the server again and got the same error. I also reinstalled my java sdk and j2ee but to no avail, I am using windows 2000 machine.  and please help!