Why My Drawreversable Frame Dissapear When I Hold A Left Mouse Button

private int m_iMouseX = -1;
private int m_iMouseY = -1;
private string sToolTipLabelText = string.Empty;
private Rectangle m_oCtlRubberband = new Rectangle(-1, -1, 0, 0);


private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{

try
{
if ((pictureBox1.Image != null) &&
(m_oCurrSelNode != null) &&
(m_oCurrSelNode.Tag as ControlDefinition != null))
{
if (e.Button == MouseButtons.Left &&
m_oCtlRubberband.X > 0 && m_oCtlRubberband.Y > 0) // rubberband started?
{
// remove old rubberband
Rectangle screenRubberband = pictureBox1.RectangleToScreen(m_oCtlRubberband);
Color rubberbandColor = m_clrFieldRubberband;
if (pictureBox1.TextDetectionMode)
{
rubberbandColor = m_clrOcrRubberband;
}
ControlPaint.DrawReversibleFrame(screenRubberband, rubberbandColor, FrameStyle.Dashed);


// clip new rubberband within the picture box only
m_oCtlRubberband.Width = Math.Max(Math.Min(e.X, pictureBox1.Width), 0) - m_oCtlRubberband.X;
m_oCtlRubberband.Height = Math.Max(Math.Min(e.Y, pictureBox1.Height), 0) - m_oCtlRubberband.Y;

screenRubberband = pictureBox1.RectangleToScreen(m_oCtlRubberband);
ControlPaint.DrawReversibleFrame(screenRubberband, rubberbandColor, FrameStyle.Dashed);

// String leveltext ;

if (e.X != m_iMouseX || e.Y != m_iMouseY)
{
// update status label
bool showSize = true;
ControlDefinition oCtrl = m_oCurrSelNode.Tag as ControlDefinition;
if (oCtrl.GetType() == typeof(HandwrittenAnswer))
{
HandwrittenAnswer oCb = (HandwrittenAnsweroCtrl;
if (oCb.DetectionMode == HandwrittenAnswer.Automatic)
{
showSize = false;
}
}

if (showSize)
{
//
int iWidth = Math.Abs((int)(m_oCtlRubberband.Width * pictureBox1.ScaleX));
int iHeight = Math.Abs((int)(m_oCtlRubberband.Height * pictureBox1.ScaleY));

sLabelText = String.Format(Properties.Resources.MsgImageRubberband, iWidth, iHeight);
}
else
{
sToolTipLabelText = Properties.Resources.ContextMenuItemCheckboxDetectionMode;
}
toolStripStatusLabel2.Text = sToolTipLabelText;
}
}

}
}
catch (System.Exception ex)
{
//here shows exception
}