Drivers Door Lock Turtle
 

#4 on the diagram, the op rod.

http://i.imgur.com/YuhpEzq.png

Mine won't go down when you remote lock (or central lock), you can push it down when locked, and it will pop back up when unlocked...

I'm thinking it's not connected properly to the cam on #1, and is resting on top of it. Hence the pop up - but not down.