GCal sync, choosing a calendar.

Hi, i've upgraded Appointments+ and i'm trying to sync Gcal. I got a success code and pasted into the form in Gcal settings... and nothing happens, it doesn't sync. It's logical because I remember a box in the old version asking for a calendar id and now i'm not being asked for what calendar i want to sync. So, something went wrong during the process, right?

Thank you in advance.