We have installed the .net 4.0 framework and registered asp.net 4.0 to IIS using aspnet_regiis, but we keep getting this error when we try to create a new (or upgrade an existing) project on our development box.

"The ASP.NET 4.0 Web extension is not enabled on the Web server. <our site address> is targeting ASP.NET 4.0.

Do you want to enable ASP.NET on the Web Server?"

When we hit "Yes", it pulls up another message of:

"ASP.NET 4.0 has not been registered on the Web server. You need to manually configure your Web server for ASP.NET 4.0 in order for your site to run correctly, Press F1 for more details."

Any ideas? That particular message pulls up nothing in a Google search...