This is normal on a fresh install. What it means is that you need to login as Admin, click the :: next to Admin (click!) and choose the Groups option.
Out of the box tiki is locked down, and you need spend a little time setting up permissions to your anonymous and registered users groups.
For example if you assign tiki_p_view from the wiki permissions to Anonymous that message will disappear and you will see your HomePage wiki page.
We have some Flash based movies at TikiMovies click the Prelimiary Settings one, that goes over some basic permissions. If you want more help feel free to get in touch.