Everything was exactly the same , even the base JBoss version. What was different was the jbossall-client.jar. Once those were in sync, it worked. Problem resolved.
When discussing an exception you are getting can you please post the exception along with it's stack trace and message, it makes it a lot easier for others to see what is going on.
Is there any chance that the server machine is running Linux? If so does the /etc/hosts file contain IP address to host name mapping?
Please read my response right after my posting. "Problem resolved". Thank you anyway.