Brake bleeding !

It doesent make sens, i wanted to bleed the brake system today so i pusht the pedal and my friend opend the bleeding screw but no oil or air at all came out, this was the right rear wheel, whats happens now, what to do ? The front brakes is ok but it seems to be a rear axel problem. Maybe sleeping on it will help, or maybe sombody knows what to do.
Author: MOPAR MIKE