Multiple Errors During Gameplay.

*** Just so you know, i already tried putting my router in a DMZ, it didnt work, and i cannot directly connect to my modem/router in this situation**

Okay, it seems that every time i join a game, either immediately when i join, or a minute or two after, i get these error messages "Disconnected due to incorrect map info", "Disconnected from server". and sometimes it comes up before the game, and the game closes. Another interesting fact is that this only seems to happen during the night, because i had the same problem last night. Any ideas on how i could tackle this problem?