Barrier block not visible in creative

The title is pretty self-explanatory. So is the following image. I JUST WANT TO MAKE AN APOCALYPSE WORLD!!! GAHHHH!!!

Also Jeb, Dinnerbone, everyone else, I mean with utmost respect what I said in that pastebin... I got bored, so I figured I would remake it for fun, and when I'm done, I would like to send it. (they probably won't see this. how unfortunate :L)