PanelDialog in EA error after change Timeframe 2 times

[Pongsapak Thinsantisuk]

//+------------------------------------------------------------------+
//|                                                        panel.mq4 |
//|                        Copyright 2017, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2017, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
#include "PanelDialog.mqh"
CPanelDialog ExtDialog;
int OnInit()
  {
//---
      if(!ExtDialog.Create(0,"Simple Panel",0,50,50,390,200))
     return(INIT_FAILED);
//--- run application
   if(!ExtDialog.Run())
     return(INIT_FAILED);
//---

   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
    ExtDialog.Destroy(reason);
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
//---
   
  }
//+------------------------------------------------------------------+
void OnChartEvent(const int id,
                  const long &lparam,
                  const double &dparam,
                  const string &sparam)
  {
   ExtDialog.ChartEvent(id,lparam,dparam,sparam);
  }

i use code from SimplePanel  ea error after change TF 2 time

thank you