Hey so here's the problem, I'm trying to play zombies with two of my friends : one being my roomate on the same ip address and one on another. When my friend from the seperate ip address invites me or vice versa we can play together fine but when I try to play with my roomate on the same wifi it won't let either of us join eachother - even for lan party - also when my friend invites either me or my roommate it says either unable to join or trying to join potential matches. How do I solve this issue?