I had 2 discs that I messed up on out for a pack of 25. One I got halfway threw burning it and remembered I had backed it up a few days before, the other one just didn't turn out like I wanted it to. They are Memorex disc. I the label they said DVD+RW 4x. On the disc themselves they say 4x RW and DVD+R below it written very small on the left side. On the right they say DVD+R Recordable 4.7GB 120 minutes. When I try to earse with nero it says it is not a rewritable disc. I've tried different Nero programs that earse the disc, 2 of them say its not RW, and another doesnt reconginze it. Any ideas?