What kinda loads are you using? Try benching more or less like a powerlifter (IE- elbows in tight, shoulder width or so grip, and lower the bar to a little below nipple level, and slightly above the sternum). The closer arm position in relation to the torso will help to recruit the pectorals. Think of it this way, put your arm straight out to the side like in a lateral raise and try to contract the pec. Now try it with your arm about 45 degrees closer to your body. Easier to contract the pec isn't it? Learned that from Scrawny to Brawny... Also try using heavier weight, not going to failure. Maybe a Chad Waterbury 10x3 or modified to 8x3, using a 5RM or 6RM with a fair amount of rest inbetween sets. Most importantly though, train smart! Don't exceed your ROM, and don't push your limits at the wrong times.