Configuring Ruby on Rails on IIS

Hi,

I am new to Ruby on Rails. I have an existing website that I need to configure on IIS. I installed Ruby Hosting package from Web Platform Installer. When I ran the website, I got the following error.

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.

Can someone please help me how to add the handler for such thing?

Thanks.