HP does not support a Vista version for the scanner...
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?lc=en&dlc=en&cc=us&product=60120&lang=en&
You might try the XP version, if Vista doesn't have a Microsoft default driver.
Check your Device Manager, after connecting the device to the computer.
Also, please delete your email address from the OP.