So you have written your first Silverlight application and deployed it to IIS but when you hit the page nothing happens. No error, nothing. You are just sitting there staring at a blank web page. Chances are you haven't registered the Silverlight MIME type yet. Go into IIS and register the following MIME type: .xap to application/x-silverlight-app. I will leave it up to you to Google the details of how to do that.