Need to reprogram the keypad. Only has numbers 1,2,3,4,5,6,7,8,9,0 with no # or * buttons and no "reset" or "enter" buttons. When I look at the ceiling mounted motor unit, there is no "enter, reset or program" buttons. However there is a set of switches (numbered 0-9) that you can select up, middle or down. I tried a different iterations of these numbers to match the original code but still doesn't seem to work........any hints?