HELP!! I am using dvdshrink, and then burning with nero. I have done this about 12 times with success. Now the last four dvd's I have burned with either dvdshrink or nero alone do not play, and are essentially blank. The error I get when trying to verify data on nero is "cannot mount the written cd." I am using a Toshiba Sattellite Notebook, with a toshiba dvd burner (internal.) What Can I DO?