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...