Verify that TCP ports 42342 and 43242 are open between client and server, and that the client can properly resolve the server's short hostname.

To test that the TCP ports are open, you should be able to telnet from the client to the server on those two ports, and get a successful connection:

telnet SERVER 42342

telnet SERVER 43242

If the ports are blocked, you will need to have your security team allow them.