C# Word automation - footer added but not visible

[dannyl]

I'm using automation to create a word document using C#. I've got it working pretty well but need to add a footer. I've done this with the following code.

foreach (Microsoft.Office.Interop.Word.Section section in wordDoc.Sections)
{
    Object CurrentPage = Microsoft.Office.Interop.Word.WdFieldType.wdFieldPage;
    section.Footers[Microsoft.Office.Interop.Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.Fields.Add(section.Footers[Microsoft.Office.Interop.Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range, ref CurrentPage, ref oMissing, ref oMissing);
    section.Footers[Microsoft.Office.Interop.Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.set_Style(ref oBodyStyleCenter);
}

That works fine, but when I open the word doc up after my application closes the headers and footers are not displayed. If I go to View->Header and Footers, they show up with my page number in them.

So my question is, how do I programatically get them to show up? I'm sure I'm missing some stupid little thing.

Thanks