CMS Made Simple Forums

Hi there,
At the moment, my navigation is appearing a bullet list. How can I make it so that it runs across the top of the screen horizontally? I have tried applying the Navigation: CSSMenu - Horizontal CSS to my template, but it is making no difference.

Any suggestions?

Have you attached the stylesheet to the template?
and changed the smarty link in the template?
to {menu template='cssmenu.tpl'}