I have a 1998 Camry XLE. I have a problem where as I approach the car and unlock the doors using my keyless remote from a short distance away the car will lock the doors before I can get around to the driver's side door to open it. The doors will also lock on their own when I get out of the car with the engine off and walk around to the trunk or passenger's side with the key/remote in my hand. If I get out of the car with the key in the ignition and the engine still running, the door will continuously try to lock itself over and over until I get back in it and close the driver's side door. This happens with either of the keyless remotes that came with the car when I got it so it seems to be a problem with the car and not the remote. Any clue as to why this is happening?