Have you tried to look at the mouse itself? Open it up and look inside - there may be dirt on the "rollers" which prevents thi diodes from working properly. Dirt accumulates gradually as you use the mouse. Scrape it off and see what happens. I hope this helps. _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. Curious about the people moderating your messages? Visit our staff web site: http://nospin.com/pc/staff.html