Hi Chezni,
I have read about this problem a few times since the latest patch has been released, and I think (not sure though...) it has to do with a copy protection problem. I don't claim that you don't have a correct version of the game, don't worry <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" /> I will look for a solution for this problem, but I'm afraid I can't help you earlier than Monday, since the people who are taking care of this are not present now. Sorry for this inconvenience.