cant get brakes to bleed 04 accord

I have a 2004 honda accord  3.0 liter vtec 5 speed auto, with trac control and 4 wheel disc with abs, I replaced all rotors and pads and both rear calipers. Then i bleed started right rear than LR than RF to LF with car up car down than bleed starting RR to LF to LR to RF nothing have tried several times they work but has soft pedal tha fades as bleed at abs unit propor val and master got any ideas