Supposed to be beating weak players but I am losing to them ARGH!!

Hey everyone I need some advice. Right now I am trying to build a bankroll and I am not having much luck and I don't have alot of money to do so. (married w/ kid and full time student). Heres what I've read so far. Harrington on Holdem #1. Started #2. Getting started on Holdem, Small Stakes Holdem and Sklansky on Holdem. During Christmas break I will be reading Holdem for Advanced players. I am a tight but aggressive player. I can read hands pretty well and know where I stand after the flop, turn, and river. I do my best not give my opponents the right odds to call, I don't play crap I'll raise, reraise, but I continually get drawn out by weak players it is frustrating. They are making incorrect calls but are getting lucky is this normal. I feel that I should be beating these guys at a higher rate but instead they are sucking money out of me. Help any advice will be welcome! Thanks [img]/images/graemlins/cool.gif[/img]