I have a 411s with the lastest firmware FSOK Its seems either after this upgrade as well as erasing a sony CDRW my drive only wants to read and write DVDS. When I try to burn a cdr or rw it will go through the burn process says complete but nothing on the disk after. I try to back up a playstation game compact disk and a Journey compact disk (audio) and get the same results. Also tried a memorex cdr as well. It won't even read a original compact disk either. Also won't copy any pictures off my hard drive. Tried to revert bact to the FSOJ but it says only supports 411s then it list my drive with the FSOK installed I running windows XP 1.7 ghz processor 512 memory 80 and 10 gig hard drives and a lite on dvd rom JLMS XJ-HD166S ds 18 firmware. I use dvd shrink, dvd decrypter burntounce and alcohol 120.