Let me see... being that is a propietary thing, you need to go to the mouse property page in the Control Panel and see the tab for the pad. In most cases, the tab you ae looking for WILL NOT APPEAR if you have a conventional mouse (and no, the color of the cover you use will not have an impact on this) attached to the system... in that case, you will only see the tabs for the external mouse... so unhook the external cute-ass geigh pink-cover mouse and if you need, boot up with nothing attached.
Then look for the Touchpad tab in the mouse propery applet.
After that, approve this post