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if it does maybe i need to reload the software. or what?
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I have had some similar issues dealing with Logitech mice in the past. You probably need to reload Logitech's software.
Here is a link to the latest version of Logitech's software for your mouse. It's for the "XP" version of windows, but you can choose other operating systems on the left of the page if you aren't running XP.
It's usually a good idea to run the latest version of their software.
Link