[HELP] HELP MEE!!! Server problems, 5165

if any one is open the account it's allready opened it's gave to me in Consle this Exception

Code:

 
System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.Collections.ArrayList.Add(Object value)
   at NewestCOServer.Main.GameClient.AddSend(COPacket Packet) in C:\rikardo updated\Main\GameClient.cs:line 141
   at NewestCOServer.Game.Character.set_Stamina(Byte value) in C:\rikardo updated\Game\Character.cs:line 1845
   at NewestCOServer.Game.Character.Step() in C:\rikardo updated\Game\Character.cs:line 5424
System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.Collections.ArrayList.get_Item(Int32 index)
   at NewestCOServer.Main.GameClient.EndSend() in C:\rikardo updated\Main\GameClient.cs:line 94

and accounts get buged and he can trade what he want and close it again and it's didn't save the char.
Any Help plzzz