Mouse Wheel and BACK

Microsoft Windows XP

Hi, I've recently got a problem with IE and explorer when I use the
wheel button on my mouse. Whenever I use the wheel to scroll down a
page I automatically get thrown back to the last page I was looking at,
as if I'd hit the back button on the browser. This is starting to get
very annoying as I use the wheel to navigate all the time. Has anyone
seen anything like this before? I've run a complete virusscan with
McAfee, and run Spybot and Adaware with no hits. I've also done many
Google searches, checked Microsofts support pages and even resorted to
looking at Help!

Any help on stopping this would be greatly appreciated.

TIA

Danny
Have you checked the settings of your mouse?