valet 562t, 1999 dodge stratus

I have been using the valet 562t in my car for several years now and have just experienced a problem with it not starting, the door locks don't work, etc.  I can sit in the car and I hear the sending unit clicking when I press the start button but nothing happens.  I put my foot on the brake, insert the key and the car will start everytime.  When I press the lock / unlock button I hear the sending unit click but nothing happens.  When I start the car normally with the key my 3 second auto door lock does work.  All fuses have been checked and all look okay.