Must be logged in to read content

I'm trying to embed a calendar on a non-drupal site, but if you're not logged into my drupal site you only see a blank page. An anonymous user can see the calendar page on the drupal site with no problem. I've tried using the page and the view as a source but the same thing happens for both.

My permissions are set so that anonymous users can access all content and views.

Thank you for your help!