Nuxology,
what does your Mouse portion of your Xorg.conf file look like? it should look somthing like this:
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "Emulate3Buttons" "true"
Option "ZAxisMapping" "4 5"
EndSection
if you want post your Xorg.config file here I'll look at it for you to get into the Xorg file just type
To access it open a terminal and type
gedit /etc/X11/xorg.conf
Copy and paste it into a reply
Jake