I have a Windows Server 2012 R2 Essentials with Active Directory, and I need to have a web site running with Forms Authentication. I have a couple of sites already on the server using AD security, but I need one that just uses Forms Authentication. I've tried numerous setting in IIS - Authentication section, but so far no luck. Accessing the site is prompting me with a Windows Security login popup, and if I hit Cancel, it then goes to my Forms login. Can't seem to figure out how to prevent the Windows Security login popup. Don't know if it matters or not, but it's a C# MVC web application.

Thanks in advance.