I'm having a little trouble getting purchases made on my iPad to actually work. I downloaded an episode of a serious I watch and a couple of songs from iTunes and none of them will play. All the music I have stored on my iPad plays, just not these recent purchases. The purchases are available to see in my iPod app/video app but they have no album art and when I tap them to play, they look like they are about to open, but then they don't. In the video app it says 'video cannot be played' and in the iPod app it says nothing, just closes the song. Any ideas? Been on the apple site and the help section says it might be authorisation, I didn't think this applied when they are purchased directly from a iDevice.