An error such as:
CORBA.INTERNAL: CREATE_LISTENER_FAILED_4
may occur.
When this error happens, the most likely suspect is actually WebSphere itself. A stray/runaway instance may be running and hogging the ports.
To solve, either switch ports (IBM support page) or just kill the stray WebSphere instances, normally guised as java.exe (as opposed to normal Java applications that use javaw.exe).