Help!! No Breaks, Master Cylinder help

Hello, I have rear disk breaks from a 98 integra and I was changing my old DX (4 Door) master cylinder to a new larger EX one, when I get it on and try to bleed the breaks the pelal are not getting tighter. Do I need to a the EX break boster? Any help is good. Thanks

i diddt know that you can use 3rd gen integra brakes......

you probably just need to bleed the crap out of the brakes. remember that you unhooked the lines from the master cylinder so there could be air the length of the lines.