One thing I found that made my '104 work flawlessly : move the drive. I had tried it in all configurations (slave, master, alone, etal) on my a7v133's VIA ide controller. I could get it to work, all right, but ONLY in PIO mode and ONLY at 1x. and at that, it still gave me a comm error and barfed occasionally. Even more worriesome : the entire computer became sluggish whenever burning, sounds got distorted, windows would stutter when opening, etc. Reading through the forums, I saw someone had mentioned moving it to his Promise ATA100 controller. Seeing nothing to lose, I tried that as well, slaved to one of my ata100 HDDs. Works like a charm. Initializes as UDMA, 2x speed works, and it burns flawlessly. And the computer is no longer sluggish when burning. Maxtor ATA133 controllers are $50 or less at your local computer shop, well worth the cost esp. since those of us w/DVD writers tend to need HDD space anyway, and you'll need that controller for that large HDD you'll end up buying! - litz