I also have a Lite-on LH-18A1P and have spent the last six hours trying to figure out why my computer---device driver, etc--and dvdfab, can see the dvd drive and the title of the movie in the drive, but not be able to read the dvd. tried to read it with nero, dvdfab, etc.---no go. Tried all three jumper settings. Nero system test recognises the dvd burner and even gives the model number, as does device driver. But, unable to get it to read dvds. Took it out and popped the old TSST 552b back in and works just fine. What could I be doing wrong here? Am I missing a step. All I did was install it and install Nero7 which came with it. When I put back in my old TSST burner I left Nero7 and it works fine with the old burner. Am I supposed to install the DOS drivers that came with it? However, this doesn't compute and how can you install them if you can't read the dvd? A conundrum that needs fixin'