every time I use a rewritable dvd-r disk more than a couple of occasions they seem to corrupt and not work , by that i mean when I go to rip the files from the disk to my harddrive or even sometimes just open the files they just pack up on me. I format the disk after using them each time using nero, anyone tell me why this happens it doesnt seem to be the brand of disks being used because i,ve tried two or three different ones and they all seem to do it.