There is a servers view in RAD. Here you can right click on the server and delete.
Check to see if any ports are open. Do a:
netstat -a
command at the command prompt (Windows?)
See if port 9060 or 9061 is open. That's the WebSphere admin console. Also see if you can get to the admin console, I think the URL is:
localhost:9060/console/ibm
That should take you to the administrative console for the application server installed with RAD. If port 9060 or 9061 is open,
you should be able to access it.
Port 9080 or 9081 is the port the server uses. It would be interesting to see if your hanging websphere test server is holding onto that port, or for that matter, if there are any other port conflicts.
-Cameron McKenzie