I have the exact same problem. I thought it was because I am using a mac, running xp through bootcamp. i don't have a clue how to fix this. And I'm getting no help from support because i'm using "apple at my own risk". Cute. Please let me know if you find a solution, since support may actually help you. Us poor Mac users who are legitimately using Windows, are written off. But they don't mind taking our money...