Brake expert's please read

I am trying to bleed the wilwood discs on the rear and they won't bleed. I put the in line prop valve on in between the master cylinder and the juction block. I have it all the way open. I have enough pressure to cause leaks I chased around but when I open the bleeder's nothing comes out, NOTHING! I know there is fluid back there. These caliper's have 4 bleeder's on them and I tried all four and nothing but a few drips on the 2 bottm ones.

I do not have power brakes and my only problem is with the rear's.

Any idea's?