Overdrive Off function

I have a 2006 Focus with automatic. When I first turn on the ignition the OD Off light comes on as it should. When the car shifts into Overdrive and I press the button on the shift handle, nothing happens. The OD light does not come on and the car does not shift out of overdrive. Is this an option not on all Focus models? In the driver's manual in the Instrument Cluster section it lists the Overdrive off (if equipped). I would assume that all automatics had this function especially if the button was on the shift handle and the light was on the instrument cluster.