I'm trying to set up a WCF Data Service on a vista machine using the setup instructions in the MM .NET developer guide. At the completion of step 1, when trying to run the solution, instead of the expected page I get:

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 didn't see any instruction for mapping the .svc extension ..

What should I be doing?