Okay, I previously posted about not being able to setup the system with C#/.NET. I never received a response. So I tried setting it up with the VB.NET code example and still can't get it to work. What am I missing? Simple setting issue somewhere? http://www.paydayloanresource.com/Coopad/ is the url that receives the Site failed automatic validation error message. http://www.paydayloanresource.com/Coopad/index.aspx is the exact page provided in the code example. I receive ad_network.php file needs updating message there. ad_network_ads.txt is writeable. If I use the php example, I can get the ad to pull up fine and validate correctly. Please help, I'm stumped. Thanks E