If this is not working, make sure that:
- The paths to PHP iCalendar are correct in your Server Settings.
- You do not have pop-up blocking software that is stopping the window from opening. If the window will not open for you on the demo then there is a configuration problem with your browser.
- If you are using Microsoft's IIS web server, you may need to do adjust some settings to allow the 401 authentication to work properly.