Coop game problems!

lately I’ve tried to play co-op campaign with a friend, but when finish loading, we return to the menu screen, and says the connection was lost. but it is only when we play campaign to the multiplayer no problem finding game. What do you think that might be?

Help please!

> 2533274854640886;1:
> lately I’ve tried to play co-op campaign with a friend, but when finish loading, we return to the menu screen, and says the connection was lost. but it is only when we play campaign to the multiplayer no problem finding game. What do you think that might be?
>
> Help please!

Did it work in the past? Has your connection changed at all?

> 2533274850493408;2:
> > 2533274854640886;1:
> > lately I’ve tried to play co-op campaign with a friend, but when finish loading, we return to the menu screen, and says the connection was lost. but it is only when we play campaign to the multiplayer no problem finding game. What do you think that might be?
> >
> > Help please!
>
>
> Did it work in the past? Has your connection changed at all?

previously I played halo ce campaign in cooperative and campaign missions Halo 2 also, the funny thing is that matchmaking can play with a friend and play campaigns ce halo, halo 3 in coop smoothly. but two weeks ago as we can not play halo 2 campaign in cooperative, always takes us out of the session. Internet connection is fine, I had no problems