redirect requests asp.net mvc iis6

i am substantially unaware something unequivocally rudimentary here nonetheless i am perplexing route bad urls an movement filters url formed conditions following presumably 301 redirects suitable page issues 404 page.

to finish i have lane during finish lane table:

routes.maproute("error", "{*url}", new { controller = "main", movement = "error" }); 

and an movement this:

public actionresult error(string url)
{
        (/* conditions met... */)
        {
            response.status = "301 changed permanently";
            response.addheader("location", /* finish url */);
            response.end();
        }

        response.statuscode = 404;
        relapse view(/* 404 page... */));
}

this works ideally locally.

however, deployed iis6, urls don't consolidate .mvc (e.g. oldfile.php) never sent asp.net slight routing.

is there rudimentary fortitude / am i unaware something?

edit :
this associated , however underneath iis6 urls but .mvc being sent asp.net mvc processing.