Q: Issues with Powerpoint on my MAC

I am having an issue with Powerpoint for MAC. I am running Office 2008 on my MAC with OS X 10.6.8. As I work on a slide, all of sudden the deck jumps all over the place! I have to constantly scroll through the deck to get back to the slide I am working on, and then try to do as much editing before the deck goes crazy again. It's a probelm that's existe since the beginning but today I've had enough of it.

Anybody have any idea as to what's going on? I use the Bluetooth mouse that came with the MAC . Could there be some sensitivity issue with it that's causing the eratic jumping?

Thanks