Help with Mail Merge to Word Doc

Hi,
I'm trying to Mail Merge to a Word Document from VB.
I have a Word Template with Mail Merge Fields.
The problem I have is that I need to insert an HTML table into one of the Mail Merge Fields, however it fails whenever I try to input from the text file.
I intended to create some VB code to find a particular Mail Merge Field and Insert the HTML in there.
However I can not seem to get it to work.
Here is the code I'm using:

VB Code:

Dim oApp As Word.Application
    Dim oDoc As Word.Document
 
    On Error GoTo errHandler
    
    'Start a new document in Word
    Set oApp = CreateObject("Word.Application")
    Set oDoc = oApp.Documents.Open(s_Templates & TemplateFile)
    
    
    With oDoc.MailMerge
        .OpenDataSource Name:=s_TempFiles & "MergeData.txt" 'Specify your data source here
        .Destination = wdSendToNewDocument
       .Execute False
    End With
    
 
 
    oDoc.Close False
    oApp.Documents(1).SaveAs (s_Drive & Subject & ".doc")
    oApp.Documents(1).Close
' Release references.
  oApp.Quit
  Set oDoc = Nothing
  Set oApp = Nothing