Me and my brother cannot conect on black ops. We have played together for ever and never had any problems. When he trys to join me or i try to join him it says " no active session available." I researched it and it saids that it has to do with strict but the thing is that both of out NAT types are  "OPEN."We can connect perfictally fine on MW3 we can connect with other people with no problem at all. So if anyone can help it would be greatly appriciated.