I just bought Ravenshield and I installed it no problem. I went to play on line and it locked up. I went to the website and and it said to turn off filters so I did. Now I can at least download servers. The problem is that when I try to join one and it asks for the CD key I put it in and it starts to load and comes back with invalid CD key? I tried all caps, lower case, dashes, no dashes. I dont know what else to do but return it. Please help, i really want to play it.