Do you have important data in your flash drive?
If no, go to my computer, right click on the flash drive icon and choose format. (Do not make a quick format!)
If the icon appears after formatting the flash drive, the virus is infected also in your computer, if this happens, post again your problem in the 'Am I infected? What do I do? ' forum, so they can help you more.
Hope this helps, post the result.
Edited by Delta16, 22 February 2009 - 08:29 AM.