i've been trying to figure this out and i'm getting no where. i'm trying to bleed a set of hayes nine brakes. i get to the point where you open the caliper bleeder port 1/4 turn and then force the new fluid into the caliper. on the rear brake i was able to force a tiny amount through and on the front brake, nothing at all. when i close everything up, there's no pressure at all in the brakes. so what am i doing wrong?