Hi Kram,
Dear member of SanDisk Community, welcome.
Friend, sorry.
Please, “clean up” your UFD (erase the content), and start again with the following:
See link: http://forums.sandisk.com/t5/SanDisk-SecureAccess-2-0/SecureAccess-2-0-error/m-p/335267#M434
Luck, and then you tell us, what happened, please.
Regards, Alfred. (Google translated)