Aside from the touch pad that's built into my laptop, I also have an optical mouse. When I have the optical mouse hooked up, they both work fine, but if I boot without hooking up the optical, I loose the tap to click functionality of my touchpad. Here's the mouse section of my xorg.conf file:

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/psaux"
Option "Protocol" "PS/2"
Option "Emulate3Buttons" "true"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
Identifier "Generic Mouse"
Driver "mouse"
Option "SendCoreEvents" "true"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "Emulate3Buttons" "true"
Option "ZAxisMapping" "4 5"
EndSection
What do I need to change so I do't loose my tap to click funtion when I don't have the optical hooked up?