it could be a few things: try the latest firmware for your dvd drive from the makers site. it could also be the disc make itself, try other makes as some discs wont work in some drives (my drive for example hates the gold colored 'Mirror media' make but it loves the silver version) DVD and CDr and CDrw are very different in how they are made, write discs have a coating of some special polymer or crystals that the laser melts and then the layer sets solid, never to be meltable again. rewrite discs have an organicaly derived compound that can be etched on, but doesent hold as much information. DVD and DVDr will be something else entirely i expect. the information on a burned disc is not as "loud" as that on a comercially made CD, this is why some older CD players wont play copied discs, i expect its something to do with why playstation2 machines will play copied CD media, but not copied DVD discs.... try the firmware and make idea and let me know how you get on good luck!