Multiplayer Issue

Modern combat 4(1.2.0f) multiplayer is not working It kept on searching and when try to Join custom game rooms shows error :- can't join room
My network speed is 1.12mbps and sometimes due to maintenance it gives speed about 300-400kbps..but I think even 200kbps is enough to play any multiplayer game...
So guys any solution to this problem...

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