Just a word of friendly advice: I hope that your friend has a "legal" copy of Tiger. If not, you won't get a lot of help here. I don't care either way - to me, it's such an early beta that it won't hurt for people to play with it. But a lot of others will jump on you if it isn't a valid copy.
Unfortunately, I can't help with your problem. I would, but I just don't know the answer.