Dual Layer Superdrive doesn't recognize DL Discs

Not sure if there is another thread on this, I cannot find one. If so please supply me with the link.
I have a Powerbook G4 and it came with a combo drive. A while back I purchased a Matshita DVD-Ram UJ-845S Dual Layer DVD burner from Other World Computing. I never really tried using it until recently.
I am trying to back up my home movies via Backup and when I insert a DL DVD it recognizes it as a CD, not even a DVD.(The DVD's I am using came with my DL Burner) I had a certified Apple Tech install the DVD drive in my Powerbook to avoid voiding my warranty. I bought the DL DVD burner to avoid using multiple disc and to backup my movies that I bought.
Are there any driver updates or something?
Any help would be appreciated.
Jeremy

I might have figured it out, but I am not 100% sure. I think the disc's I got w/ the DVD burner are CD-R's. I put one of them in an older laptop(w/ only a CD burner and it said it too was a CD-R disc.
Not sure if that is the problem. I am going to go buy some DL discs and try them and when I do I will post.
Jeremy

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Dual Layer Superdrive doesn't recognize DL Discs

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