I didn't have to press purple to begin. First you have to pair the remote to the car. After the button on homelink changes from flashing slow to a fast rapid flash, then you release all buttons (homelink and remote control) then you get out of the car, press the purple button which will flash slowly on the garage opener motor. Get back in the car and press the button, 1, 2, or 3 that you want the button programmed to. The light will flash twice, release and then test her out.