Ruby passenger door locking

[rubyman]

Mine is the same as Colin's photo's, but when you look at the piece with the hole in the top where your chain fits when I turn my outer door handle this piece when looking at it from inside the car moves to the left away from the locking catch, so the catch is doing nothing ? 
as said the bottom of the lever moves to the left the top with the hole in it moves to the right pushing the piston against the spring and the door opens.

hope you can help
Thanks