I use DVDxCopy or DVDxCopy Express to copy a dvd I own (Gigi) with my Sony DRU500a (firmware 20f). Using +R or -R media, they copy without error and play back using Power DVD with no problem. However, when I try to play them in my Sony CX975P, I always get the "Cannot play this disc" error message displayed on the TV. Dozens of other DVDs that I own copied and played without a problem. I am running XP Pro with SP1 and numerous updates.