i updated my firmware for my Toshiba SD-R5112, now it doesnt recognize some of my DVD-Rs. when i try to burn something , the program either says to not a recordable disc or no media. I also tried to Nero CD/DVD speed and it give me "NO Sense Additional Information". so can someone help me with this please. i dont know how to uninstall the firmware either. i tried doing it but it didnt work.