We're trying to play the network multiplayer version of Battle for Middle Earth. (2 PCs on a home network) In the custom games lobby we can each see the other person there. Either one of us can create a game, but whenever the other tries to join it, we get a "mismatch" error message.
As far as I can tell, both the DVDs are the same version of the game and neither of us has downloaded any patches or modifications.
I did wonder if it was something silly to do with the exact order in which we did things when setting up a multiplayer game, but I can't find any information about the right way to do it.
Any ideas as to the cause of the error and suggestions as to a remedy?