Land warrior freezing when joining multiplayer game

[fodda]

Hi, I'm new to these forums and pretty much new to LW although I used to play a long time ago.

But anyways, for some reason whenever i try to join public games it freezes immediately as it gets to the joining game screen, and i cant move my mouse or anything. I have to ctrl alt delete to close it and it says not responding. and the only reason my problem is different from the rest is that i use steam. any help appreciated