Has anyone had any problems getting this player/recorder to play discs created on a pc drive? I'm using a Pioneer dual format dvd burner on my pc. I've tried creating 2 backup discs on the pc onto Sony DVD-RW discs. Both times I put them into the Pioneer to have it just display the message "Cannot play this disc". They play back fine on the pc. The strange thing is that if I do exactly the same thing on the pc but using a Philips DVD+RW (a disc that the pioneer isn't supposed to support at all) it plays the film perfectly. What's going on?