I have a 1999 Hyundai Elantra. Just this morning i tried opening my car but my remote did not open it. The red light that flashes when i hit the button still went on so i know its not my battery(which i changed about 6 months ago). Could it be the transmitter in the remote or the reciever in the car?
Or could it be that it just lost it's signal? If it did how would i be able to reprogram my remote?

My keyless remote is a Prestige ELVATOH APS2K4MS