I bought an LG 18x Super Multi DVD Rewriter the other week for some basic copying. I've been putting a few tv programmes to disc. Everything has been working fine with - discs, but I picked up a few discs today that are + discs and they won't play on my pc. They do however, work on my dvd player. I was also tried to copy a + disc using nero and got an error message "Cannot copy this disc to DVD". Any reason why the drive doesn't like + discs when it should like all dvd formats?