I downloaded some videos that were already in mp4 format. However, when I try to sync it to my iPad in iTunes, it tells me that the files were not synced because they cannot be played on the iPad. What should I do? The files play fine in WMP, iTunes and QuickTime. I tried using the "Create iPad version" under Advanced in iTunes - it seems like it's doing something, and saves a new version in the Library. I can sync it after - but it shows a blank white screen (on both the Pad and in Tunes) but I can hear the audio. ggggrrrrrr!!!!