Web Forms :: Logon Failed Due To Server Configuration

i have a Error :

<forms name="appNameAuth" path="/" loginUrl="~/login.html" defaultUrl="index.html" </forms>
Server Error in '/' Application.

Access is denied.
Description: An error occurred while accessing the resources required to serve this request. The server may not be configured for access to the requested URL. Error message 401.2.: Unauthorized: Logon failed due to server configuration.  Verify that you have permission to view this directory or page based on the credentials you supplied and the authentication methods enabled on the Web server.  Contact the Web server's administrator for additional assistance.

The web.config in folder admin of my 

<?xml version="1.0"?><configuration><system.web> <authorization><deny users="?"/><allow users="admin,administrator"/><allow roles="admins,administrators"/><deny users="*"/></authorization></system.web></configuration>

In file Global.

routes.MapPageRoute("login", "login.html", "~/login.aspx");routes.MapPageRoute("default", "index.html", "~/index.aspx");

If I use extensions .aspx, it runs normally

<forms name="appNameAuth" path="/" loginUrl="~/login.aspx" defaultUrl="index.aspx" </forms>