I have exactly the same problem. the unit even says DW800A on the case but it only ever identifies itself as ATAPI DVD+RW 8X4X12 and the firmware always comes up as xx26. Nero says so, dvdinfopro says so, even my mac said the same xx26. Unit functions fine otherwise, but I really want -RW!
I couldn't flash it with any utilities, even under pure dos. Anybody have any ideas?