Calendar 5.2.3 iCal "there" but not accepting / CiviEvents

Greetings,

I have calendar working no problems with views or anything else.

the iCAL settings: admin/settings/calendar/calendar/ical

offers me "feed 0" to add, upon submit of my "name" and "url" ical page refreshes. Nothing happens. boo...

I'm hoping to add iCal feeds to CivEvents I have set.

Anybody know why my feeds may not be accepted or why iCal isn't catching?

and example of the feed URL is: http://mysiteurl/civicrm/event/ical?reset=1&page=1&id=3