I don't want to mess up your evening, but it seems like you are in trouble:
http://www.usbman.com/forum/UltraBoa...397&SID=978993
If you do a search for "adir rom" it seems like a pretty chronic problem
http://www.google.com/search?hl=en&l...22&btnG=Search
Anothe reason I never ever buy Sandisk