KQ driver's side door lock not opening

[Resal007]

I have a KQ laser with a problem with the lock not opening. When I insert the key it only turns to about 1 o'clock not 3 o'clock as it is supposed to. I have been able to open the door by wiggling the key while I pull up on the lock knob. When the door is open the key operates normally, including the central locking. But when the door is closed, the key won't turn. I don't think the problem is with the "lock" but where it secures the door to the body. I have removed the door cover but not too sure what to look for.

Any thoughts would be greatly appreciated. I am getting a little tired of climbing in through the passenger door! I am sure one day I'll accidentally kick off some knobs off the radio or heater.

Thanks