OK, then, do the following:
In your /etc/X11/xorg.conf file, look for a section that looks something like the following:
Code:
Section "InputDevice"
Identifier "Configured Mouse"
...or, the identifier may be named "Generic Mouse" or something that involves mice.
Copy that part for us. Also, look for a section that starts Section "ServerLayout" and copy that for us too, if you would please.