When I look at your site with Firebug, I see several 404 (file not found) and 500 (internal server error) errors, so something about your site's configuration is messed up. It is most likely some kind of server configuration or an issue with the app's web.config file, but based on what I can see I can't tell which.
I suggest trying the installation again, carefully following the instructions in the Admin Guide. If you still can't get it, I offer standard installation services for $100. If for some reason I can't get it running or the issue was some kind of bug, I'll refund the fee. Cheers!
Roger Martin
Creator and Lead Developer of Gallery Server Pro