sounds like the hinges have got bent ,,up or down a little , you will know if its up or down when you try to shut the door, as it will hit the top of the latch or the bottom of it, , open the door and get a good hold of it, try bending the hinges , by lifting the door , up or down, if the door is not too much out of line , you should be able to get it back into line this way,
k
October 2012