Everything was running just fine before patch 1.9. Now after installing it, i can play one or two rounds in MP then the game will not connect anymore to any servers.

It says connection has been lost. And in order to be able to join MP servers again, i have to restart PC. Then it's the same cycle all over again. Worst patch ever!

WTF??? how can i fix this???

BUMP

the MP has been fubar from the beginning. make sure you have an open NAT type and that your firewall is not blocking the program. Sometimes a firewall will block a program after an upgrade is done because the hash changes on the application.