ISS Keeps disabling windows authentication after publish ASP.NET MVC APP

I am using windows authentication in an ASP.NET MVC application.

Every time I publish my application I have to go back in to IIS and enable windows authentication.

Any Ideas why it would keep disabling it when I publish? It causes all kinds of headaches to keep re-enabling it.

Thank you!

You might go to IIS server to check machine.config and figure it out.