Cold Fusion on IIS7 installation Error

I install Cold Fusion on IIS7 and Configure IIS for ColdFusion, and I do these settings at Windows Server 2008. But when I try to install ColdFusion on Window Server 2008 then I receive HTTP 404.3 Error, HTTP Error 404.3 -Not Found.The page you are requesting cannot be served because of the extension configuration. If the page is a script, add a handler. If the file should be downloaded, add a MIME map.
I am very confused about this error. Please tell me how can I remove this error.

