So, me and rebus_forever started a multiplayer game without a problem. After 6 or so hours of gameplay, we decided to stop for the night. We saved the game file, and closed the game.
A couple days later, we tried to pick up where we left off. I did have some issues with my connection, but i opened up some ports, hosted a new game (just in the lobby, not started yet) to test the connection, and rebus_forever could join fine. After that, i exited out of the lobby, loaded the save game, and then rebus_forever tried to join.
When he joined, the "waiting for player" thing beside his name changed to (WAIT 1000), counting down to zero, and sat there. He could not enter the game, and no matter what we tried, it wouldn't load or start.
Something that might be a problem is that he has the steam version, and i have the version from this website. Does anyone know how to solve this problem?