Question on coop (MechWarrior 5: Mercenaries)

Comrades, and this is just me, it is not included, or someone else ran into this? I wanted a friend to play the coop did not grow together, what I have is that he climbs a connection error. The scheme is one - just starts download and immediately throws to the home screen with the words connection error.
What could be wrong?

Game litsuha, Internet 100 MB/s, throw the link on a non-business way for Coop-Land - forest.