avs wont go fullscreen

Im using version 3 and wehn i go to try to play my avs in full screen all that happens is my screen goes black and it tells me at the bottom its loading whatever avs im tryin to play, but it never shows up, thanx to anyone that has an answear to this.

If you're using fullscreen overlay mode, turn it off. If you aren't, try turning it on.

It's the checkbox at the top of the fullscreen options.