Check this out:

Configuring the mouse:
mouseconfig

but better use the XF86Config-4 in /etc/X11

Search for Mouses and thier section.
try to change the protocol to IMPS/2 or so ...

Info:
Linux Busmouse howto:
http://www.yolinux.com/HOWTO/Busmouse-HOWTO.html

Very good - Linux on Laptop HOWTO:
http://www.redhat.com/mirrors/LDP/HO...O-6.html#ss6.6