Dynamic Top Menu - Stretch across entire screen...

I've messed around to get the image to repeat-x, but I must not be in the right spot with the CSS.

#gk-nav { background: url("../images/style2/menu_sprite.png") repeat-x 0 0;

^Doesn't do the trick.

Can someone please give me some indication on how I make the background for the top menu span the full width?

Thanks in advance.
Gene

Bump ?