James,
Take it off and clean the posts, lube lightly with some grease and put the brake back on with the locating pins in the MIDDLE hole of the 3 on your frame, adjust the pads then put the cable in, you can get even tension by either bending the springs OR using the adjustment screws to add more tension to the looser side or slacken off tension on the springier side
Hope this helps?
Dingo