I had the same problem I changed all the batteries but I have 2 door openers, 3 remotes and 1 keyless & I can't get no more then one door to open because somebody told me I had a Craftman they have problems with them after about 5 years. Now for your problem try to program the keyless first put in your code and press hold and then press & release the learning button on the back of the opener,then press a button on the remote then press and release the learning button give it a try I can get one door to open for me that way. Good Luck

reauterry - I gave it a try, but it didn't work. You may be right, it may be broken. It is over 5 years old. Thanks.