That's a little unusual for it to just hang with no additional clues. You're going to have to put your troubleshooting hat on.
* Is the processor getting taxed?
* If you use a different browser to navigate to your gallery (http://localhost:55477/Media.aspx), what happens?
* Do you get different results when connecting to SQLite?
One idea: Create a new web project in VS based on the compiled version of GSP and build your web site on that.
Roger Martin
Creator and Lead Developer of Gallery Server Pro