I have a Sony DVD-RW which works fine when burning, never had a prob but seems to come up with the PMA Update Failure when trying to erase my Traxdata DVD-RW ? Burning to these disks has never failed. But fails 50% of the time when erasing ? Does anyone know why ? I never have anything running in the background and I've defraged the hard drive etc etc. Seems odd that it burns perfectly but has this error when erasing.