How to close a form anmd show another form if the progress of background worker reaches 100%

How to close a form and show another form if the progress of background worker reaches 100%..Form is showing but the form supposed to close isn't closing...

void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        Stopwatch sw = Stopwatch.StartNew();

        sw.Stop();
        var elapsedMs = sw.ElapsedMilliseconds;
        int sp = int.Parse(sw.ElapsedMilliseconds.ToString());
        // Your background task goes here
        for (int i = 0; i <= 100; i++)
        {
            // Report progress to 'UI' thread
            backgroundWorker1.ReportProgress(i);
            // Simulate long task
            System.Threading.Thread.Sleep(100);
        }
    }

   void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            // The progress percentage is a property of e
            progressBar1.Value = e.ProgressPercentage;
            if (progressBar1.Value == 100)
            {
                Form1 fm1 = new Form1();
                fm1.Close();
                Form2 fm = new Form2();
                fm.Show();
            }
        }

ALso tried under

private void myBGWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            MessageBox.Show("Done");
            Form1 fm1 = new Form1();
            fm1.Close();
            Form2 fm = new Form2();
            fm.Show();
        }

Tags: C# (C# 4.0)