2005 PT Cruiser Remote Start/Door Lock Fobs Not Working
 

I recently bought a 2005 PT Cruiser with a factory remote start and door locks. I have both key fobs(single button). I used the remote start a couple of times. All of a sudden it stopped working. All it does now is cause the lights to flash and horn beep. Wondering if something I did messed it up or weather I'm doing something wrong. Anyone have anyone has a user manual for them and whether or not the fobs can be reprogrammed without taking them to the dealership if that is the issue?