Replying to FKS/Pivot Forward Pressure Arm Stuck

Anyone ever run into this at? I can't turn one of the forward pressure adjustment screws on my bindings at all (even stripped the screw a bit while trying). The bindings were new last season, so I wouldn't think that this should be happening this early. I tried working in some WD40 but it hasn't seemed to help. There's no evidence that anything is broken/bent and is putting undue pressure on the arm that won't turn. Thoughts?