Problem with Act4

hello i have one problem with act4 after connecting to act4 server it instantly kicked me out

i try change ports open ports but nothing
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Solved

Could you please share your solution with all guys who might have this problem in the future?

Just do this like me.
// Load account by given SessionId
if (Session.Account == null)
{
bool hasRegisteredAccountLogin = true;
AccountDTO account = null;
if (loginPacketParts.Length > 4)
{
if (loginPacketParts.Length > 7 && loginPacketParts[4] == "DAC"
&& loginPacketParts[9] == "CrossServerAuthenticate")
{
isCrossServerLogin = true;
account = DAOFactory.AccountDAO.LoadByName(loginPacketParts[5]);
}
else
{
account = DAOFactory.AccountDAO.LoadByName(loginPacketParts[4]);
}
}

#closed