After recently switching to XP Pro from XP Home, my Matshita UJDA710 CDRW/DVD Combo Drive no longer reads DVD's. CD player and CD Writer both work fine, but won't play DVD's. I've searched for drivers and firmware with no success. I've tried different software packages and decoders with no luck. It is not likely that any damage occured to the drive since the upgrade to XP Pro. There must be a driver or firmware out there somewhere that can solve this problem. Please help!