What a polite error message, but annoying none-the-less.

I used DSL's tool to create a bootable usbkey. I plugged it into my fairly new Dell Precision 670 and it appears to boot until it gets to the dreaded "can't find knoppix filesystem, sorry". I have the image on a 2.0 gb Lexar USB drive. I tried typing "dsl nodma" as well as a bunch of other commands to try to get this to work, but nothing has so far. The harddrives in this machine are connected via SATA. (Not SCSI or IDE). I tried booting off of the cd and it worked fine on the same machine.

Does anyone have any clue as to why this isnt working?