I am having a problem with my garage door. It does not matter what remote I use or If I use the key pad. The door will stop opening 1/4, 1/2, 3/4 of the way from opening up. Light works, and if you hit the button again, the door does go back down. If I keep trying, it will eventually open all the way up. Please shed some light on what is going wrong and how to fix it. Thanks a lot.:confused: