A sony disk "the last action hero". I have 2 DVD burners, one external, the other internal. I tried the external, it burns all the way to the end, and died at 99% complete write with a CRC error. I try the internal, it completes without a problem, but the backup is completely unreadable and locks up the PC is you try and read it. The DVD player at the TV does not read it either. Any clues?