Me and my friend have a 3.1.3 server running, but since we built a querry, neither of us can go on the server because it keeps on crashing. So because of that, I made the server 3.0.4, but now we can't get on to that version because when we select, "3.0.4," in the options, only 3 mods load. When we try to go on with the 3.1.3 version, it says it is missing mods. What can we do?