This is my trouble:
Participants to my event have completed the registration form, created with CiviCRM 4.4.7.
When they receive the confirmation email, they can also download clicking on Download iCalendar File. And it does not work. I tested it myself, trying to download it on Outlook and the link (this one http://events.esn-eu.org/civicrm/event/ical?reset=1&id=61) takes me to a page telling me the following message:
You are not authorized to access this page.
What can I do to solve the issue? Thank you