If the door locks correctly when open then the door has probably dropped, you could adjust it back up on the hinges by adjusting the lower hinge back out a bit and the top hinge screw it in a bit
Or the other way is to take out the top bead then pull up the sash & repack the spacers on top of the panel to realign the locks.
The cheats way is to move the keeps down which leaves the door in the dropped position
Hope this helps
Paul from Value Doors, September 2010