Ads not rotating

Hi,

I’ve bought and installed the pro version of wpadcenter but I’m having issues getting the ads to rotate.
When I’m logged in as admin they rotate fine but when I view the site as a normal user the ads don’t rotate. If you refresh the page, or leave the site and visit the page again the same block of ads are shown. Navigating the pages makes the ads changed but the ads you see on that page when you refresh or revisit stay the same.

If you look at the home page you’ll see they don’t rotate.

Any ideas?

Chris

The page I need help with: [log in to see the link]