I work for a non profit, Food for the Hungry, and we were heavy google wave users. We converted to Rizzoma, but our users in our corporate office experience connectivity issues when trying to access Rizzoma.com/wave regardless of browser. It constantly says disconnected or trying to connect. We are running a proxy service with content filtering, but I have added Rizzoma.com to all of the exempt list. Is there an additional protocol, port, or IP that I should unblock for the service to work? Thank you for your time.