Xzaber

Hey there! So the story is this. I update Arma 2 (uses steam), checking things in options (everythings works) I can even write on the squad tag. But then..When I join a game, I can't move around. I can aim and shoot with mouse, but everything that needs a key, doesn't work. I can alt + tab just fine, shift + tab just fine, but controls doesn't work ingame. I use the steam version, Windows XP, tried restarting, didn't work, tried reinstalling and restart, didn't work. Please help

So there is no known solution for this? Sucks.