If you are able to execute test pages with the .asp extension but not pages with the .aspx extension (you get parsing errors), you have ASP enabled but not ASP.NET. To enable ASP.NET, you first have to install it, and then “allow” it. Do this by executing the following commands from a DOS command prompt:

 

 

The /i flag is for install. After ASP.NET is installed, you “allow” it by going to Internet Information Services (IIS) Manager > xxxxxx (local computer) > Web Service Extensions and clicking ASP.NET v4.0.30319, and then Allow.

For more information about these settings, see E-Commerce installation.