Followed Saab owners manual instructions. Worked perfectly for one door (Genie) but not for the Sears Craftsman. Tried clearing the mirror programming (buttons 1 and 3 for 20 seconds). Also tried removing and reinserting the fuse (no. 17 in the trunk). I believe the Craftsman opener is what Sears calls a "Security+" system. According to the Sears manual, the code between the remote and the receiver changes with each use. The remote has three buttons.