I have the same mouse and at first it wouldn't work till I changed the 'Option "Device" "/dev/
psaux"' in XF86Config
Here's the mouse section from my XF86Config:
Code:
Section "InputDevice"
# Identifier and driver
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/psaux"
Option "ZAxisMapping" "4 5"
Option "Buttons" "5"
Option "Emulate3Buttons" "no"