Your problem seems to be the opposite of what is more commonly known here. Most people report the remote locking not working but manual still works. Have you tried starting the car and then locking?? My boot sometimes doesnt fully unlock after one press but after another go it usually unlocks. If you can enter the car, perhaps disconnecting the battery for a while might solve it, BUT make sure your keys are OUT of the ignition or it will wipe it clean and you wil be left with a bigger and costly problem!!