The beta has not officially started yet, so it shouldn't be expected that everything such as the random battle arenas should be working at this point. When the game is officially online for people to login, an announcement will be made. Please understand that we're still getting everything ready for all you guys so you can have fun playing during the beta. Once the beta starts, we will welcome any comments you guys have about problems you encounter in the game.
So please, until we make the announcement do not try to log in. Thank you.