Gmail and Ical integration

Hi, I am having some issue to integrate Suite Calendar inside my gmail.

I ve been able to give gmail the calendar ical url using this scheme but no event are coming :
http://[my serveur]/ical_server.php?type=ics&key=[my key]&&user_name=[my username in suite]

When i look inside the ICS file it seems fine and there is an event in it but gmail is not showing it.

I m using Suite 7.2.1