Sacred Gold NO-CD and LAN multiplayer

[GuyArcher]

So, I can play the single player mode with no problems. However, my roomie and I can't get a LAN game going. When I create the game, I get a 'no valid game server' error. When he creates the game, it has a ! in the symbols and when I mouse over it, it says wrong version or something to that affect. We bought the game at the same time so I don't understand how we could be using different versions.

Anyone have any help on the problem?