Sammy, clean the backing plate, front and back. You can even use some 4 "0" steel wool. A little bit of brake grease of the wheel cylinder area that touches the backing plate and a light smear on the backing plate will work wonders in the operation of your brake system.
Wayne
PS Don't forget to put a smear on the backing plate where the shoes touch, (a flat area about 3/4 of and inch on each side.