MVC :: After Deploying To IIS6 Login Does Not Work?

Deploying my MVC 2 application onto the IIS6 works more ore less fine, but after changing the MapRoute

inside the Global.asax to

routes.MapRoute(
"Default", // Routenname
"{controller}.aspx/{action}/{id}", // URL mit Parametern
new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameterstandardwerte
);
routes.MapRoute(
"Root",
"",
new { controller = "Home", action = "Index", id = "" }
);

I changed the Url inside the web.config and the logOn view is called correctly, when I am trying to access

an action with the [Authorize] attribute.

But, after filling in Username and password I am having problems when I want to log on, it is showing :

Cannot find Url Access.aspx..

Looking into the source of the page I can see the following:

[Code]....