Custom iCal link for export - VRBO blocking details?

I've created a custom iCal link with guest info and property location for export to VRBO. On their calendar it still just shows "untitled event" as if I had used the default iCal link. Do you know if VRBO is blocking the details?

Screen shot of my custom iCal link --> http://i.imgur.com/h4BXQsJ.jpg

That should work, but VRBO are always changing their formats.

What if you try a new link with all of the options checked?

Thank you for that suggestion, Chris! It worked and now shows booking # and guest name.

i would be careful about showing HA the guest names and number of people. why give them more data.