Ads are shown for logged in users. No ads to visitors...
Take a look:
http://PrisonForum.com
There are currently to Ads, one in the Welcome area, another, non working PHP ad asa Error link, in Index.
Thank you!
(your Banners are clicked!)
Make sure you have the proper permissions set
Just helping others:
Go
http://YourSite.com/index.php?action=permissions;sa=modify;group=-1
http://YourSite.com/index.php?action=permissions;sa=modify;group=0
Ad Management
Enable ads ---> "Check" it.