Ok machine is new to shop and trying to send programs back and forth to pc. It was working fine now i cant seem to erase a program i get "Write Protect" when i try to erase the last program. When i punch in program i would like to send to machine and hit execute i get a comparing thing blinking. I go to send it over and it says no program compared. Any help its probally a simple thing but with all the safety features on this machine it has me losing my mind. Also the machine can send programs just seems to be a issue erasing and accepting them. ????