I'm having a problem with my power locks. A few weeks ago I changed the battery in my key fob. This was the ONLY thing I had done before this problem started. Now the fob and the inside swtich will only work to unlock the doors, not lock. If a door is open and I try to lock the door it beeps at me, but when the doors are all closed, then nothing. Is there something I could have done just replacing the battery in the fob, or is there more to it? I even dug the old battery out of the trash and tried it, and tried the other fob, but same results. Thanks for any suggestions!