มันฟ้องว่า Record can not update. Because: Object reference not set to an instance of an object. ตอนเรากดปุ้ม เเก้ไขครับ

 Private Sub ButtonEdit_Click_2(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonEdit.Click
        Connection = ("Database=account ;Data Source=localhost;User Id=root;Password=root;Allow Zero Datetime=true")
        strSQL = "UPDATE income  SET " & _
              "ID_income  = '" & Me.ID.Text & "' " & _
              ",Date = '" & Me.CreateDate.Value & "' " & _
              " ,List = '" & Me.TextBoxList.Text & "' " & _
              ",Money = '" & Me.TextBoxmounny.Text & "' " & _
              ",Comment = '" & Me.TextBoxComment.Text & "' " & _
              "WHERE  ID_income  = '" & Me.ID.Text & "' "
        Try
            If objConn.State = ConnectionState.Open Then
                objConn.Close()
            End If

            objConn.Open()
            objCmd.ExecuteNonQuery()
            objConn.Close()

            Me.ID.Text = "Record Updated"
            Me.ID.Visible = True
        Catch ex As Exception
            Me.ID.Text = "Record can not update. Because: " & ex.Message
        End Try
    End Sub
End Class