I opened the port recommended! I connect to a session and when I started playing, I am disconnected from the server! since patch 1.2 the problem we started
It seems to be a widespread problem. I just had a look using the Search box and found this that you can try if possible: http://www.gamesas.com/forums/viewtopic.php?f=40&t=21697&hilit=disconnected
Add servers to your favorites and join from there. Its the only way I can play without getting the same error and disconnection that you get shortly after joining a match.. when I added servers to my favorites and join from there it works every time.