oki have a 851s. I used LTNfw v1.0.0 to flash it's f/w to GSOH and scince then my 851 will not detect in nero. I have reformatted the pc twice to see if that helps and nothing.
Windows id's it as a dvd-R when the drive is empty then as a cd rom with any disk in.
Have XP Pro SP1
DFI lanparty mobo (KT400a)
851s is set to slave on the 2nd channel, master is my old _nec 5800a
i would go back to the old f/w but the back got killed in the reformat, i saved the wrong file.
If i get no joy i'll just take it back to the shop and get it exchanged.