I am trying to delete some activities from my Zoho calendar which is synced to Google calendar.  When I click on the activity I only get "View/Cancel" as options.  When I click on "View" there are butons at the top that say "Save" "Delete" and "Cancel" but the "Delete" button is not enabled.  How do I enable the "Delete" button or is there another way to delete tasks from the Zoho calendar directly?  See attachment.