Custom Link Question

I am using pods as my custom field plugin and I am getting the iCal feed for our custom post type for events to work fine, save for the custom link. For our custom post type we have a field called “regfox_slug” and it has an https:// URL in the field. It is an external link to our wordpress site so that when people click on our events they go to the external event page. However, when using the URL parameter &customlink=regfox_slug I can’t seem to get the .ics file to add the URL to the event listing in Outlook or Google Calendar. The page I need help with: [ log in to see the link]