Do you have <authentication mode="Windows" /> in there somewhere as well? I believe that is also required.
The below link has some information on the output of a few variables based on the configuration settings of the web.config and IIS
Do you have <authentication mode="Windows" /> in there somewhere as well? I believe that is also required.
The below link has some information on the output of a few variables based on the configuration settings of the web.config and IIS