message: changed billing information - but I haven't changed anything!
With only 3 months of using itunes, I've been a rather new but happy user until I upgraded to iTunes 6.0.1.3. Now whenever I'm trying to buy a song I get the information that my billing information has changed (which isn't true, I've always been using the same credit card which worked fine) and when I add the missing information, the song doesn't download and the information doesn't seem to be saved.
Please help me! I can't buy anything anymore!
iTunes 6.0.3, Windows XP