I installed a Craftsman model 139.53985D about 2 years ago. All remotes and wireless keypad were working. Not too long ago my wireless keypad stopped working, the keypad would light up when i put the code in but the door would not operate. I replaced the battery and again the keypad lights up but I cannot get it to program to the opener. I have tried the programming steps several times but it will not link up. I have cleared all the codes and tried to reprogram and everything links up except the wireless keypad. Any suggestions would be great. Thanks.