Put the hooks into the slots with the door in a vertical position. Pull the door back towards you...get ready for a snapping sound as the spring pops back.
This will now allow you to move the locks to the open position.
You can then try putting the hooks in their correct position as per your manual. (Hint, make sure the door is square with the opening before closing the locks).
Hope this works...it happens to me every time I take the door off for cleaning! Best of luck.
Blossbink, August 2009