rear wheel brake issues

I have a 2005 Toyota Tacoma Sport, I have changed the rear wheel cylinder. Before I did, I did not get any fluid dripping out of the brake line. After I changed the wheel cylinder and put all of the parts back on, I tried to bleed the brakes and still did not get any fluid coming out of the line. I pumped and pumped and still the brake peddle keeps going all the way down. Has anyone have this happen to them and how did you fix the problem?

 

I was having a similar issue on mine and it turned out the bleeder screw was stopped up. Had to pull it off and unstop it by running a small pick through it. It was stopped up with rust and debris. I used a compressor to blow through it to make sure it was unstopped before reinstalling it. It could be something as simple as that. The hole on the inside of the bleeder was rusted as well as debri in the external part.