02 espace front door not locking remotely

[volcane_nut]

we've just bought an 02 reg espace and having got home, the front drivers door won't lock with the remote. All the other doors lock ok. The motor on the petrol flap lock is noisy but i can live with that. Could this be down to a broken fuse / relay or is there something more serious wrong?

I can't hear the motor trying to lock the door