Game disconnected: client closed down connection. DURING GAME.

EA, please, help me to solve the problem with connetion. When I connect to a server in battlelog, it drops connection after logging in. Any solutions, like this, at the similiar topics didn't help. I can connect to empty servers.  Could you tell me the reason of this problem or better solution?

And additional info: Battlefield 3 works perfectly no any problems with connection.