My remote was working fine then just stopped working. Its a craftsman (green button version). I thought it was the battery I replaced that it still didn't work. Then I went to reset the code and I noticed that when I press the key it works if it is right next to the main box on the ceiling. As soon as you take it away about a foot or less it won't find it. The other remote works fine, the wall unit works fine and the keypad works fine. Any ideas?? Do I just need a new one??