does the firmware software allow the use of a port number like the lg firmware?
meaning you need to type a number whereas it states where the drive is connected as in 1 for primary master or 2 as in primary slave and so on?
if so you can try to reflash the drive with that option
it happened to me when i tried to flash my 8320 to 8400 and the floppy had bad sectors and it failed to upgrade it
i rebooted and reflashed the drive and it worked
even tho the bios nor windows would detect it any longer
or even just try reflashing the drive
see if it will actually work this time