What can I do to make sure my new towel bars stay on the wall? On the back of the parts that are supposed to stay flush against the wall there are two keyhole openings. I have put the screws up on the wall in the spots to match the keyhole openings. I can get the keyhole openings lined up and slide the backs of the parts onto the wall to get the towel bars installed, but lots of times when I take a towel off one of the towel bars, the towel bar holders fall right off the wall. What do I need to do so this won't happen?