Try to look on ur Try_GameLogin_Taywan for this line
Code:
BEGIN
UPDATE Users_Master SET [color=red]Leave = 1[/color], JoinDate = GETDATE() WHERE UserUID = @UserUID
END
If Leave = 1 set Leave = 0 and run the SP.
Second problem can be if you was using the Dash GM_Stuff and you may forget to add it again on your database it gives the error "Account Doesn't Exist"
Readd it on your database and will start working the Accounts.