Server connexion problem

[U505]

I want to play in multiplayer but i have a big problem i cannot reach no server.I can only reach the map and see the number of players under the flags but then nothing happen. It seems the game beginn to sleep. I don't really don't know what i now should do. I have already veryfied the integrety of the game cache but whitout results. Does someone has an idea ?
Here is my config : I-7 3930K,Asus rampage IV Extreme,16 GB ran Gskill 2133MHz,GTX 580 3GB Point of view,OCZ vertex 3 Max iops,Cooler master HAF 942
THanks in advance for your suggestions