Door locks continuously click but wont lock. Replaced remote batteries,- nada? on 2006 Chevrolet Cobalt

The problem started around a month ago, and then stopped. It began again this week. I read the car manual and it eludes to replacing the batteries. I did and it stopped for 1 day then began again. It's driving me nuts. I don't want to take it in to the shop if it's an easy fix. However, I need to be able to lock my car doors!

Asked by for the 2006 Chevrolet Cobalt