Replacement Ipod


I recently replaced my son's broken 20G iPod with a color iPod. He had been able to sync easily with our G4 (10.3.9) and G5.
Now with new iPod, the G4 sync is fine but he receives an error message "-36" when trying to sync the G5 or manually transfer music or photos.
With the G5, he has logged in under my profile and I suspect this is the problem. When logging in under his name, however, the same problem results. We have tried the latest iPod updater, and restoring settings.