LOVE THE GAME!! But...

Overall I love this game. It is by far one of the best gaming apps out currently. Yet, for some reason I am only able to play when I am connected to Wi-Fi. When I am not connected to a network I receive the message, "A server error has occurred." The only option I am then given is to tap "Ok," after this I am given the same message. All my other friends who play the game do not have this problem and are able to play without a Wi-Fi connection. Is anybody else having this problem? Is there any way to fix this so I can play when I dont have connection? Please let me know and definitely download this game.

McFly0809 about KINGDOM HEARTS Uχ Dark Road