if you're on LAN, you should have a Router coming into play.
Check that all games use the port 4321, create a game on 1 PC, and then do "Join Local Game" on the other PC. The Host should appear in the list. If it doesn't work, use the "Join Distant Game" and enter the local IP of the Host PC (not the Internet IP).
== Mana Games ==
>> I don't answer Private Message, except if it's really a _Private_ topic <<