[support] Need help fixing my invisible calendar

Hello, I've got a website in Drupal 5.2 here: http://www.menashalibrary.org All of a sudden today, the calendar is broken. If you click on events, you get a blank page. I am completely baffled as to what may have happened. I checked the server logs, and there's nothing helpful there. Also, nothing in the drupal logs to indicate anything wrong. Where do I even start troubleshooting this problem? - jody