Question on Door Locks...

Hi all,

I have an issue with my drivers door lock in that when I shut the door (I have to give it a good tug otherwise it doesn't catch) it automatically locks itself (which is a pain when you get out and leave the engine running and shut it from the outside, locking yourself out). You can reopen it using the key but a real pain that it is doing this.

Has anybody come across this before? I have had a very quick look on a couple threads but couldn't see much.

thanks!