I have the Sony DRX-500UL rewriteable DVD burner, which burns to all four DVD formats. On my previous Dell computer, using MyDVD (the software which came with the DVD burner), I was able to use rewriteable disks. I now have a new laptop with Vegas Movie Studio + Dvd, and DVD Architect Studio. When I tried to burn a rewriteable DVD disk, the burner spit out my blank disk and I got an error message that the media was incompatible. Might this be an issue with DVD Architect and the DRX-500UL? What other things should I check? Could the problem be between the burner and the laptop?