If enabled, the Calendar Button on the Sidebar will open the included PHP iCalendar in a new browser window, populated with your tasks data for the range you specified in your Preferences.

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.