Bleeding brakes.....

[LeDevil]

I replaced my Master cylinder today here's the steps I took what did I do wrong?
I bench bleed the M/C as instructions said to and like I have many times before
I then bolted it to my brake booster
Hooked up the front line then the rear
had my fiancee pump the pedal until it was hard
I would open the back passenger bleeder valve until she said it hit the floor.
Told her no matter what not to lift her foot she did so.
I then closed the bleeder valve and repeated this until there was no air and the pedal was hard.
While bleeding I made sure there was always Brake fluid in the reservoir.

Well now when I have the truck running I push the brake it gos all the way to the floor and my Dummy Brake light comes on and the trucks slowly roll/lunges. So please tell me what I did wrong?
Thanks LeDevil