Here is what is happening: we play PC and console games together all the time, we're on separate connections to a home network with a good broadband connection, this is never a problem in other games; specifically we've played tonnes of BF:BC2 together on PC and 360.
If I join a map and he connects to my game, I get booted with the error message "Connection Timed Out".
If he starts a game and I join him, my battlelog launcher thing just says "Connecting..." indefinitely.
Been trying all morning, no luck at all.
If I can't play Battlefield with my brother, the game is of no use to me at all.