2007 - keyless entry stopped working? - SOLVED!

I disconnected my vehicle battery to access the left front headlight for replacement. After reinstalling the battery, the keyless remote no longer works. Another clue is after locking the doors with the door lock switch, the car no longer beeps once and flashes the parking lights when the door is closed. Total time with the battery disconnected was about an hour. I previously had the battery disconnected for a timing belt replacement for about 8 hours with no ill effects on the remote, so I was surprised when this happened. Any help is appreciated.