I?ve burned a dvd back up disk on my g5 tower (Running 10.4.2). When I try to read back the dvd on the same g5 system, the disk is ejected and cannot be read. I am burning the dvd with Tiger?s built in burning software. The only dvds that can successfully mount seems to be commercial dvds. What is the problem. Do you think that I?ll better results with software like roxio toast?