No brake fluid to rear wheel cylinders

Just got through installing a brand new master clyinder on my 69 plymouth valiant got it bench bleed got all the air out of it install it on the car went to right rear wheel open the bleeder valve up while a friend held the brake pedal and no fluid came out and the pedal didn't move went to the left rear the same thing. i did take a paper clip and open the valves up and poked it through.. still no fluid.. what do you guys think is going on here?