Ok I have a PX-716A model with all the latest updates. But whenever I changed the bitsetting of the dvd+r disc to make it to dvd-rom disc using Plextool Prof , and burned a dvd movie. The dvd then won't be able to play on the drive anymore, it couldn't even read it. I tried to play it on my other stand alone dvd players, none of them play. This is even worser than not to change the bitsetting, because I burned some of the dvd+r dvds, and they played fine on my stand alone dvd players, and of course it played on the PX 716 drive. so what's going on guys? anyone has this problem ? thanks.