C9 Error ??

Im usually playing with 5 chars and using sbot, but one of char must be bugged or something, coz it wont login back and get c9 error after every relog, other chars works perfecty. What may cause this problem.

Thank you for you help :)

It usually appears when you overload your connection, like too much downloading/uploading, sometimes it appears just with one clientless open, depending on server. Try to reset your modem/router, or just go 1 by 1 with the chars, eventually to see if really one is bugged.