Problems with Directory Plugin

Hi

I recently installed the Directory Plugin on my site - http://www.systemlays.co.uk - We now have a number of listings but nothing seems to be showing on the site:

If i got to http://www.systemlays.co.uk/betting-directory/listings/

There is nothing there and if i click on 'listings' it just sends me back to the same page.

Have i done something wrong? Am i missing something?

Thanks
Jon