First off, you need 40gb MINIMUM for your Unity. If your version does not say that, your version is outdated. Update.
Second off, make sure the port is OPEN. (that one looks fine.)
Third, you guys needs some nodes.
http://www.jcafe24.net/index.php?topic=518.0 Follow instruction #4. Also, in the "INFORMATION", on 2c panel, some fresher node may float. Use those for more hitbox-ing.