your car key has 2 operations
1. For the engine immobiliser
2. Central Locking.
Your problem lies with the central locking and obviously not with the engine ignition key micro-chip transponder.
In this case you would be advised to visit your local garage and have a chat with them over your problem.
In the meantime have a read of this website it may assist you.
www.mirez.co.uk/KeyProg.htm
Mel.
April 2006