Yesterday I would like to install Siverlight add-on to Visual Studio 2008 to make some Silverlight application. The installation of the Add-on worked perfectly. I had no errors or something like that. When I created a blank Silverlight, compiled it, and opened it in a browser to see if it works… then a stupid error comes. In IE it is “Page cannot be displayed” and in FF “Firefox can’t establish a connection to the server”.