Add Watermark to Word 2007 document via automation

Question

I have an automation application that adds a custom Watermark image to a document.  After the watermark image is added, when the user types information into the document, the display of the characters lags behind the typing by a second or two.  This is very annoying to power typist.   This only happens when the image is visable (i.e. Print View) and not in Draft View.  If I add the watermark image manually to a document, the typing delay does not occur.

The following is the code fragment that addes the Watermark image:

private void addWatermark(Word.Document doc)
{
    object refmissing = System.Reflection.Missing.Value;
    string watermarkPath = Path.Combine(Directory.GetCurrentDirectory(), "Watermark.jpg");

    if (File.Exists(watermarkPath))
    {

        object linkToFile = false;
        object saveWithDocument = true;

        doc.ActiveWindow.View.SeekView = Word.WdSeekView.wdSeekCurrentPageHeader;
        Word.WdHeaderFooterIndex hfIndex = Word.WdHeaderFooterIndex.wdHeaderFooterPrimary;

        Word.HeaderFooter headerFooter;

        if (doc.Sections[1].Headers != null)
        {
            headerFooter = doc.Sections[1].Headers[hfIndex];
        }
        else if (doc.Sections[1].Footers != null)
        {
            headerFooter = doc.Sections[1].Footers[hfIndex];
        }
        else
        {
            headerFooter = null;
        }

        if (headerFooter != null)
        {

            try
            {
                Word.Shape watermarkShape;
                watermarkShape = headerFooter.Shapes.AddPicture(watermarkPath, ref linkToFile, ref saveWithDocument, ref refmissing, 
                                                                ref refmissing, ref refmissing, ref refmissing, ref refmissing);
            }
            catch (System.Runtime.InteropServices.COMException e)
            {
                Debug.WriteLine(String.Format("{0} - Error Code = {1}", e.Message, e.ErrorCode));
                throw e;
            }
        }
        this.word.ActiveWindow.View.SeekView = Microsoft.Office.Interop.Word.WdSeekView.wdSeekMainDocument;
        this.word.ActiveWindow.ActivePane.View.Type = Microsoft.Office.Interop.Word.WdViewType.wdPrintView;
    }
    else
    {
        Debug.WriteLine("Could not find watermark image");
    }
}

I'm using Visual Studio 2008, and the Microsoft Word 12.0 Object Library.  The image is a black and white jpeg this is 8.5" x 11". 

How can I fix this? 

---

DDrabo