I am having confusing on adding new blank sideboxes to my site. I am trying to install an addon available on zencart website.

http://www.zen-cart.com/index.php?ma...roducts_id=174

I have already uploaded the files to required folders. But still the sidebox hasn't shown in the site. I have read the readme file carefully. Am i missing something ? do i have to configure anything on the admin panel in order to display it?