Sara pointed out this afternoon that there was a problem with the iTunes HW I put online last night. I think the file was currupted when I uploaded it because it wouldn’t work for me either!
I have sent it up to the server again and it seems to work on both mac and pc. Can you delete the old one from your iTunes library if you downloaded it last night or this morning and try again. Please leave a comment if it still won’t work for you.