getting *.php to run *.aspx

I am working on a site that has a little flash gadget for which I do not have the source for and cannot change. The flash file is requesting 'file.php' on the server. I need to be able to provide file.aspx's content instead. I've written the following httpHandler:

namespace MyHandler
{
    public class UrlHandler : IHttpHandler
    {

        #region IHttpHandl开发者_如何学Pythoner Members

        public bool IsReusable
        {
            get { return false; }
        }

        public void ProcessRequest(HttpContext context)
        {
            string vPath = context.Request.RawUrl;

            if (vPath.IndexOf("file.php", StringComparison.OrdinalIgnoreCase) > 0)
            {
                    context.Response.Redirect("file.aspx");
            }
        }

        #endregion
    }
}

In IIS i've also mapped the *.php extension to use the .Net ISAPI Module in Handler Mappings. But when I navigate to file.php it just shows a 404 error.

Any help of fixing this, or another solution would be grately appreciated.

Kind Regards

Put the handler in the system.webServer section as well.

http://msdn.microsoft.com/en-us/library/46c5ddfy.aspx