Facebook Share

Firstly I've used a code to make the news open on a different page rather than just replacing the index content I'm not sure if that could affect this...
But whenever I try to share it on facebook it will always try and share:
".co.ukfull-story.php/?id=1432838651" when it should be sharing ".co.uk/full-story.php?id=slam-dunk-review" any ideas??