I'm on Sean Nalewanyj's program (Truth about building muscle e-book). Basically I train 3 times a week, one hour, very intensively and always to muscular failure.
I've been on this program for 8 weeks. When I started, I weighted 160lbs. Now I weight 160lbs. There is no increase at all.

I have always been able to eat a lot without getting much fat at all. I'm 180cm/6feet tall.
I supplement with whey protein and glutamine. I eat protein after and before each workout, sometimes when I go to bed and sometimes when I know I won't be getting a good meal any time soon. I try to eat every 2 hours, protein and carbs rich food.

I haven't seen much increase in the amount of weight I can lift/squat/pullpresswhatever. My muscles always hurt after each workout because of training to failure so it shouldn't be because I don't train hard enough.
Any solid advice or should I just eat more and more and more? :\