Bug ( disposed object)

Question

when user clicks on this event <CreateToolStripMenuItem > ,CR  shows the form ,but when you close this form and wanna 

reopen it  ,below  error occurs 

<< ObjcetDisposedException  was unhandled  "cannot  access  a disposed object." >>

where shall I get the instace of  the object (CR) ?

pay attention that I used  the FormClosedEventHandler .

this is my code

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace Mini_dbms

{

    public partial class Form1 : Form

    {

        CreateDB.Form2 CR = new CreateDB.Form2();

        

        public Form1()

        {

            InitializeComponent();

        }

        private void ToolStripMenuItem_Click(object sender, EventArgs e)

        {

        }

        private void CreateToolStripMenuItem_Click(object sender, EventArgs e)

        {

           

            //CreateDB.Form2 CR = new CreateDB.Form2(); 

            CR.Show();    //  error in here  while reopenig it<< ObjcetDisposedException  was unhandled  "cannot  access  a disposed object." >> 

       

        }

        private void Main_Load(object sender, EventArgs e)

        {

            

            CR.FormClosed += new FormClosedEventHandler(CR_FormClosed);

           

        }

        void CR_FormClosed(object sender, FormClosedEventArgs e)

        {

            if (CR.flag == 1)

            {

                toolStripStatusLabel1.Text = "successfully created!";

                

            }

            else if(CR.flag==2)

            {

                toolStripStatusLabel1.Text = "Creation failed !";

            }

            

        }

    }

}