I have a C90 that has a multisite license and the multisite works for the most part except for the second site that is connected to the call. The second site get audio but no video is transmitted. All they see is a black screen unless context is being pushed. I therefore seems to me that codec is sending the Presentation screen to the second site in the call. If this is the case, how can I prevent this? The first and third sites connected always receive both people and content. The second site only sees a black screen. Any ideas? By the way, the updated the firmware to 6.3 and 7.0.2; to no avail the same problem exist.