door is in "wind" frame out of square slightly, adjust it by throwing it on the hinge which means in your case moving the bottom hinge in the frame slightly out a bit and the opposite to the top hinge, chop a little more out, this should close the door onto the frame better, thats if its timber, if upvc adjust the washers on the hinge, it will throw the door tighter to the frame, or it may have an allen key adjustment, good luck
alan ghyllsidebuilders@hotmail.com, November 2008