|Are the drivers installed?|
What you could try, well it worked in XP, is use the TWAIN drivers, not sure if vista has them.
Basically, install a photo program like, photofiltre http://www.photofiltre.com/
then you can aquire images. File\ import twain, that should use generic scanner drivers. There are many programs that can aquire,
A thank you would be nice, if I have helped.