So me and my friends are trying to play multiplayer together. We all purchased and downloaded it through steam and we are all friends on Steam and Live. For some reason me and freind A can connect to each other but me and friend B can not. Me and friend B can both connect to friend A but if i'm in the game friend B can not join and vice versa. We have also tried connecting to a random multiplayer lobby and the same thing happens, i can join and friend B can not or friend B can join and i can not. We've been trying to fix this for a few days and i've been looking everywhere for an answer on why this is happening but i've had no luck. Any help at all would be greatly appreciated!