Duel Monsters Genesis

Everytime I try to log on it says "connection closed". Can anyone please tell me why I can't log on, because i see that other players are logged on to the game and I can't.

Stupid game's glitched and servers are messed up freaking every time I get into the game.

It lags like crazy, the cards I wanna look for don't always show up, and it's glitchy with the duels sometimes.