Disconnect from sever

Hello guys

My cf game run perfectly before, but now i got disconnect after some minute playing and never disconnect in lobby. This fact mean my internet connection is OK, i think. The problem maybe due to host sever or the game itself (but i didn't change anything and game run very well before)

Can someone help me to resolve this problem? I cant play cf anymore because of this...

EDIT: i have never disconnect from any online game before