Make sure that you can ping the box.
Make sure that you have the same version of server and client (different versions use different ports..).
Make sure that you have this stanza in your /server/server.ini file:
[firewall]
rmi_exported_server_port=1.1.1.240
Please replace the IP with the IP of your cloverleaf server.
Restart the host server.
Alternatively, open the hicservedradmin gui on the server x-windows session, and go to the host server firewall tab and enter the IP address there under “exported server address”.
