Installed a new theme and this happened?

I am doing it correctly as i have done it the same way on other sites but this one doesn't seem to work.

Why is my site like this instead of the theme i installed? http://gainsomefame.com/

http://gyazo.com/df7973a976029ddb7fb78fc170c21710

That is like file stylesheet.css not loaded on your theme.
Please ensure you are load on file stylesheet.css