I have two Genie garage door openers. I have tried to follow the manual but this does not seem to work. I reset the entire system by holding the 1st and 3rd buttons. Then I hold one button down while holding a transmitter within 2" of the mirror. I do this until the light changes its flashing. I then push the learn button on the garage door opener which starts the red light flashing on the opener in the garage. I then get to my car and hold down the button until I get sick of it lol. Nothing happens. What did I miss?