I'm not familiar with your machine, but I think the DVD drive is part of a plug-in module. I would guess that the DVD drive is therefore set to be slave. I also think that on some DVD drives, the same firmware supports slave and CS. IT would be good if you could find out if my guess is true, but Toshiba won't tell you. They want you to pay them $300 or $400 to provide the same drive you can get for $100.