Problem with the game on the network.

[Sklifosovsky]

Sorry for my English, I'm from Russia.
I and my friend have version 4.0 installed. We connect to each other using a cable. The game is stable until the time when the train is used. As soon as someone of the players used the transportation of troops with the help of a train, the "move" is not transferred to the enemy. Hangs after clicking "Transfer progress".
Both Win7 computers are installed on both computers. Java is updated to the latest version.
Tell me how you can fix the problem.

[Plaid]

I don't think TCP/IP multiplayer works at all in GS, play hotseat or PBEM.