From the manual it says that there is no driver installation required ...
this is what the manual says ...
Computer does not
recognize your scanner
when connected. (You
cannot find removable
disk)
Connection failure. Make sure all cable
connections are secured.
Restart the computer if
necessary
so my suggestion would be to first see if you have another cord for this unit if you do try that there may be a fault in the wire or test this unit on another computer i will look for more info hope this helps