I created my first Sites application on Friday. However, I am only able to get the 'landing page' to work. Any links from that page to other pages on the Site generate a "... is down for maintenance" message

I have authorized these pages to be part of my Site so it's not a permission problem. (prior to authorizing the pages, I was receiving a different error).

This is the error screen:

http://screencast.com/t/zhNh1NBwulZ

And this demonstrates taht the TicketPurchaseInstance page is authorized:

http://screencast.com/t/6MZbOEgnU