[Hobo-Wan Kenobi]

For some reason whenever I try to play a new objective based map that I have downloaded with another computer over a local area network the game ends every 3 seconds. No matter what I do, the game says allies(or axis sometimes) are victorious every 3 seconds and the level starts over. It does this over and over until I eventually just quit the game. Does anyone know how to fix this problem?