First week of my first Mac, so I'm sure I've screwed something simple up. I've downloaded both WMP v9 and Flip4Mac. I have folders for both applications in my Application Folder. I have been able to get the sample WMP movie to play in WMP. But when I try and play an .avi file it won't let me choose any player other than the Quick Time. I see the other players, but they are grayed out. Any ideas?