http://www.dark-squirrels.org/ is the right address. I see the problem, but I don’t know what’s the reason.
Can you please try to turn off the SEF URLs, and check if it works?
Also please check, that you have one menu entry for the calendar view. Please post the URL of you calendar page here.
15MtA5fPyKWn3c7J9NSSisSNZL3Qaz7ayU
