Ok I need some help figuring this out. My Son and I are trying to play RA3 Co-op. We have 2 computers (We have also tried a 3rd). His is on the house Wi-Fi and mine is on my phone's hot spot. We can both start games with other people, but we can't start a game (Co-op or otherwise) with each other. We get the error connecting 1-2. Any suggestions?