Last week I had just finished burning a DVD Movie, and I went to burn another and my drive would not recognize the blank DVD+R. I have previously burned close to fifty differnet movies and I am still using the same Imitation brand DVD+R. I installed a new dvd drive HL-DT-ST DVD-RW GWA-4082N(same model as the first malfuctioning one), and still have the same problem. Removed the drive through device manager with no luck. Also uninstalled Nero and had no luck with that. I also tried using dvd decrypter to burn it over and it won't recognize the disc either. Any ideas what I should do? I don't think it's physical since I swapped drives. I also can read burnt dvd's, commercial dvd's, burnt cd's and burn to cd's. Been in contact with Gateway support and they have been of no help.

Running XP sp2, Nero, DVD decrypter, DVD Shrink, Imitation 4.7GB DVD+R brand discs, Burner:HL-DT-ST DVD-RW GWA-4082N Gateway.