Loading screen

Hey every one, I have a problem since i bought the game, 2 days ago, I try to join a server (any server) and when I double click it, it enters “loading” and the screen is grey with the words “loading” in white, then after a couple secs, it sends me back to the select servers window and I basicly can do this forever and it will send me to loading screen again and again. Im on windows 7, my drivers are updated, ive tried uninstaling the game and instaling it again and It just seems not to work. Any help plz?

Aliens II_O_O_II