Can't get Directory categories onto home page

Hi,

I'm unable to get the categories page onto my front page. I'm able to get the listing onto the front page, bit not the categories (as is shown on Directory demo).

If I post this link into the listings page will i then be able to view the categories?? Is this link correct?

[dr_list_categories style="grid | list" lcats="1,2,3"]

Many thanks,
Ben