I have a 2 year old Craftsman garage door opener which has worked great. I have two visor-clip remotes, and 2 keychain remotes. I had to replace the battery on my wife's keychain remote. After I did that, I couldn't get the opener to 'accept' the remote. So, I erased ALL the remote codes and started from scratch. Now, I can get EITHER the 2 visor-clip remotes to work, OR the 2 keychain remotes to work. I cannot get all four remotes to work, even though they all worked previously. Local Sears dealer cannot help; I refuse to pay $55.00 for a technician to come to my house. Any ideas???