Combobox in datagrid

i wanna display a combox in a datagrid. here is the main code. but i get error with message that "handle the dataerror event"




private void Form2_Load(object sender, EventArgs e)
        {
            System.Windows.Forms.DataGridViewComboBoxColumn Column1;

            DataTable table = new DataTable("t");
            table.Columns.Add("col1");
            table.Columns.Add("col2");

            table.Rows.Add(table.NewRow());
            table.Rows.Add(table.NewRow());
            table.Rows.Add(table.NewRow());
            table.Rows.Add(table.NewRow());

            table.Rows[0][0] = "furqan";
            table.Rows[0][1] = "1";
            table.Rows[1][0] = "sulman";
            table.Rows[1][1] = "2";
            table.Rows[2][0] = "asdfass";
            table.Rows[2][1] = "3";
            table.Rows[3][0] = "ghiojf";
            table.Rows[3][1] = "4";

            DataSet myDataSet = new DataSet("dsname");
            myDataSet.Tables.Add(table);


            Column1 = new System.Windows.Forms.DataGridViewComboBoxColumn();
            Column1.DataSource = myDataSet.Tables[0];
            Column1.ValueMember = "col2";
            Column1.DisplayMember = "col1";
            Column1.AutoComplete = true;
           
            dataGridView1.Columns.Add(Column1);

            DataGridViewComboBoxCell cell = new DataGridViewComboBoxCell();
            cell.DataSource = myDataSet.Tables[0];
            cell.DisplayMember = "name";
            cell.ValueMember = "id";
           
            object[] a = new object[1];
            a[0] = cell;

            dataGridView1.Rows.Add(a);

        }







whats the problem ???