Hi!
Generally, it's a bad idea to have 11 exclamation marks in your question title.
Concerning your problem, is it an automatically launched test-server or have you set it up on your IIS under it's own application?
I would recommend that you set up an IIS application and link a virtual directory to your silverlight project source.
If you have IIS installed, you could deploy your project to c:\inetpub\wwwroot\MySilverlightProject or something. Make sure your firewall allows incoming port 80. The easiest way would be to just copy your silverlight project to that folder.
This assumes it's a project which involves some kind of website. This assumption I derived from your wish to host it on a webserver.