Hi. i have a craftsman's wireless keypad. I recently has changed the unit, but kept the old keypad. I think i had it program and work before. But lately the battery has run out and i had changed the new battery , but somehow i'm not able to reprogram the keypad. If someone know how to reset the code and reprogram the new pw. Please let me know.. Thank you so much.

my keypad model. craftsman 139.53876