Mush if you want to gain mass forget about abs for now ok? Mainly concentrate on your other body parts for now, just try to keep your stomach flat in the meanwhile , and then when you get the build you desire, start working on your abs.
Trust me .......oh yeah and since your sorta skinny( as Joesis pointed out), you should look more defined, then top that off with a 6 pack and you'll look better than Stu.
