I have a problem, i used nero express and i wanted to add extra files to this old cd i had, its all data, now i burnt it and suddenly the old files aren't there, but its not a rewritable disk, how can they dissapear, and it only says it has used 1.52 mb now, which it was almost full before. It cant have been erased, is there a way to get them back or some sort of software or something. Thanks.