Light coloured Riteks

[cactus]

Quick question: I ordered the light coloured Riteks a while back from Rima.com by accident. If I backup a movie, there's some definite pixelation here and there and then it freezes after about an hour. Doesn't matter which of my DVDs I try to back-up, its almost always at the 60 minute mark. Think its just the media? The good Riteks I used never had a problem. I'd realy appreciate the help!