Im guessing you run either Windows me,2k,xp
Ive got one of the Dell Memorystick Pen Drives, it s a USB connection
Now, for Windows me,2k,xp the pen drive is automatically detected an no additional driver as such is required but for anything lower its a different story
My Windows 98 Machine needs a driver for the Pen drive to work
If you can try re-installing the driver or trying another pen drive and see how you get on
J