bmck... I don't know where you are on this right now...? I wanted to close the loop on some info I gave you previously about the ASPI...and which Praetor interjected with some important info. If you are still having problems, I would suggest updating your ASPI with ForceASPI. Here is a download link, and it also has a ASPICHK.exe program further down the page so that you can check the ASPI. http://forceaspi18.w.interia.pl/ I would also suggest you visit the drive's mfgr site, and download the latest firmware upgrade. The above things need to be in order whether or not you use Mt. Rainier...which is a very handy app.