i have model 1265 267 1/2 hp & 2011 Dodge Caravan w/ homelink remote in sunvisor, my liftmaster remotes work fine, i did step by step car manual, light blinks that it learned code, but door not respond, car manual says push learn button on liftmaster, but i do not see learn button, so i am nervious might screw up code & home remotes may stop working, what do i do ?