I can't play online

please, can you fix this problem?
I have the x-box one version and can’t play online.
the game find a session but can’t connect.
yes, I’m already check the connection settings, NAT, etc.
I play online other games, just the horizon 2 I have this issue.

You asked the same question in http://forums.forzamotorsport.net/turn10_postst22663_Can-t-Connect-to-Online-Sessions.aspx yet for some reason I have a hard time finding what you actually did like “connection settings” and “NAT”. I mean, everybody can say he/she checked stuff but without posting what you actually have applied, it’s anyone’s guess what the problem is especially after 3 weeks of doing/trying.