[AccessD] Help w/VBA code

This is VBA code to clear a bunch of objects on a MS Word form (2007). It is erroring out on, "For Each oFF In ActiveDocument.FormField" and says  something like, "User defined type not defined" ??????? 

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Public Sub ClearFields()
 
'MsgBox "Test"
Dim oFF As FormField
 
For Each oFF In ActiveDocument.FormField
  If TypeOf oFF Is TextBox Then
    oFF.Text = vbNullString
  ElseIf TypeOf oFF Is ComboBox Or TypeOf oFF Is ListBox Then
    oFF.ListIndex = -1
  ElseIf TypeOf oFF Is OptionButton Then
    oFF.Value = False
  ElseIf TypeOf oFF Is CheckBox Then
    oFF.Value = vbUnchecked
  Else
    '...
  End If
Next oFF
 

End Sub
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The error did go away, if we changed "TypeOf oFF" to just "oFF", but then I get another error on the next line...it now doesn't seem to like "oFF.Text"...but that IS the value I am testing. Anybody have code to clear a form?