[wollw]

I had the same problem at first. Try putting it after wherever you're loading the plugin itself.

edit: Also, thanks airblade. I think I'm going to keep using this.

[wollw]

I experimented a bit more and found if I put it before my "syntax on" and color scheme setup lines it doesn't work, but if I put it after them the fix works. Raticide's comment clued me in.