difficulty

My girlfriend bought 2 copies for us just to play multi-player. We were so excited until we came up with this co-op issue. It keeps saying that connection failed, I have tried to use my public IP address, my router IP address, tried port-forwarding, 2 cabins, etc. Not only is this game boring...

Hello, at first, i played this game online MP with a friend and now we are playing in local coop. What we seem to experience, is alot more monsters, than in the online mp. We are wondering if the local coop is scaling for 4 players instead of 2?