Help with my menu

Hi,

I’m currently setting up a new theme for my site. I am using this theme here:
http://jinsonathemes.com/fabs/?themedemo=Boxoffice

I am trying to get the same menu as the demo site, but my menu won’t show up as a hierachy menu. Here’s my site:
…

I’ve also set the main pages as a parent page with the subpages to it. But still they all line up next to each other in the main menu.