Main toolbar doesn't change when I change the skin

I'm trying to change the skin for the toolbar. The menu skin changes just fine, but the toolbar always stays the same. I have the toolbar checkmarked. Any suggestions?

Most skins are transparent. They don't change the toolbar background just a buttons. You can change the toolbar background color (gradient) or set the overlay image without the skins.

OK, thanks!

Speaking of skins, how can I tell which ones work? I've downloaded several TLB skins but when I try to install them it says no skin is present.

PS I was trying to achieve a type of look you see on the mac where the toolbar icons are sitting there without any toolbar background.