Solved [C#] Object reference not set to an instance of an object

was working perfectly
I did not modify this part of the code
I modified other parts
now is giving this error

I don't know what to do
can anyone help me?

Code:

    [ChatCommand("cash")]
        void chatCash(BasePlayer player, string command, string[] args)
        {
            SendReply(player, String.Concat("Seu cash atual e: ", Convert.ToString(ObterCash(player))));
        }
        int ObterCash(BasePlayer player)
        {
            string ID64 = player.userID.ToString();
            var menu = Config[ID64] as Dictionary<string, object>;//->the error is here next
            if (menu != null)
            {
                object value;
                menu.TryGetValue("cash", out value);
                int cash = Convert.ToInt32(value);
                if (cash > 0)
                {
                    return cash;
                }
                else
                {
                    RemoveCash((BasePlayer)player);
                    return 0;
                }
            }
            else
            {
                return 0;
            }
        }

[DOUBLEPOST=1426531538][/DOUBLEPOST]Config[ID64] //error is here
[DOUBLEPOST=1426555983,1426530125][/DOUBLEPOST]I found the solution
I will leave here for if someone has the same problem
I mechi in another callback code and removed the
LoadConfig ();
just added it and problem solved