When automating the merge of a doc via VS.NET, I am loosing the data
connection with in the doc and thus getting erroneous results.  Has anyone
seen this behavior or know where to point me?

Here is a simplified call to the doc:

Private Sub PrintReport()

       Dim wordapp As ApplicationClass
       Dim wordDoc As Document
       wordapp = New ApplicationClass
       Dim sPages As String
       Dim sfullpath As String = "C:\Projects\TestWinApp\Output\in\test3.doc"
       If File.Exists(sfullpath) Then File.Delete(sfullpath)

       If File.Exists("C:\Projects\TestWinApp\newdoc.doc") Then
           wordDoc =
wordapp.Documents.Open("C:\Projects\TestWinApp\newdoc.doc")
           wordDoc.MailEnvelope "MergeUpdate")
           sPages =
wordDoc.Bookmarks.Item("Print").Range.ComputeStatistics(WdStatistic.wdStatisticPages)
           wordDoc.PrintOut(background:=True, Range:=4,
outputfilename:=sfullpath, Pages:="1-" & sPages)
           wordDoc.Close(True)
           wordDoc = Nothing       ' close doc
           wordapp.Quit()
           wordapp = Nothing       ' close word
       End If
       lblMain.Text += "File complete"
   End Sub