Black Ops 3 Problem

Hello,

I buy Black Ops 3 on PC, i have a problem, my father also buy,
but when i play and that he does not play,
he can't connect to black ops server.
And its the same when he play and i dont play ...
I search on google but nothing ..
Have the same internet connection, his local IP address is fixed and mine too.

Thanks.

Might be caused by disabled UPnP on the router, just try to enable it

I enable it and i disable but its the same

Go complain on steam forums or email activision