Trying to start to use it more, but for the life of us we can't get it to UNLOCK the car. If I place a fob inside and hit the J, it will lock it. But if I go back in a few min later to unlock it and hit the J again... its ( the activity Key) is dead as a doornail. Only way we could get the door to otherwise unlock was the other fob. Anyone else have this problem or are we missing something?