Today I tried locking the car whilst one side door was still open. Since then, I can't use the key to remotely lock or unlock the car or set the alarm. The wing mirrors no longer fold in although the hazard lights blink. I can't open the rear tailgate door. I checked fuse 14 and it's ok. The manual doesn't mention a fuse for the security system. Everything else is working fine. What have I done? It's like whatever I do with the remote key, the only result I get is the flashing hazards. Any help appreciated.

Brian