painting brick

i'm painting the brick that's on the front of my house ( 25 yrs old) I have primed it with kiltz and now im going to paint it with behrs marquee satin paint.. my question is I've been told to use a flat brick paint and that I shouldn't of use kiltz as a primer.. can u help me out and tell me what should I do?? I've read that satin and eggshell paint is ok to use on brick..