sry i didn't mention i can log in other account but sky_cuteboy_tw can't and i mention this problem happen in when i leave in duel and pvp area. my English is bad,Thank you for your answer.
i alr try every version and client,it said you are sending too many packets same this problem happen in when i leave in duel and pvp area :P My problem hasn't been solved yet, I hope you can help me .w.