I would agree with these guys, you need to do heavy basic exercises. I would do squats, deads, bench, OH presses, oh and chins, lots and lots of chins (love 'em). IMO, however, I would do more than four sets per bodypart. 4 working sets of the big compound movements, but also some assistance work, like rows, leg presses, incline bench, push presses, things like that, for a strictly mass building routine, I would leave out alot of the isolation movements for awhile. Also, you need to eat a ton(not actually a ton) of high quality carbs, protein and calories and sleep alot. Hope this helps.