I don't know if this has been posted but hopefully it helps someone. I've been getting alot of d/c's in madden12 whenever i try to load a game. It kept happening to me but once I deleted all of the Madden early release files everything worked fine.
If you got the madden12 season ticket, delete those files if you're getting disconnected, or move them to a flash drive to see if that's the reason why it keeps happening. Hope this helps