I have a C.T.A.C. holster for my hk usp fullsize and with the addition of my new belt from "the belt man" the rear clip doest stay on the belt, it slides off the inside. My old belt (flimsy) worked fine with this holster. I am attaching some pic's. Look at hte rear c clip. Any clue on why this is happening? I already went ahead and ordered new clips.