microsoft.public.word.vba.general

I am collecting info from an MSAccess record and trying to merge it in Word.
I would like this to work with any version of Word that the user may have
installed. My MSAccess app will be a runtime app that I will be putting on
various machines in different workplaces.
Here is the code I am running from MSAccess:

Public Function AddressBlock() As Boolean

Dim wd As Object
Dim wdActiveDoc As Object 'RM: Added this to help ensure that you're
'working on the document you intend to.
Dim wdField As Object 'RM: Note the change in name here to avoid
'ambiguity with the Field object in both Word and
'Access. As well, I changed the type, since
'(like Word.Application), you have to use late
'binding.

Set wd = CreateObject("Word.Application")
wd.Visible = True

wd.Application.ScreenUpdating = False

Set wdActiveDoc = wd.Documents.Open("K:\legalper\merge_ad.doc ", False,
False, _
False, "", "", False, "", "", 0)

With wdActiveDoc.MailMerge
.Destination = 0
.Execute
End With
wd.Windows("merge_ad.doc ").Activate
wd.ActiveWindow.Close 0
'It bombs here with "Automation error: The object invoked has disconnected
from its clients", and the next line is highlighted.
'What I'm trying to do here is open merge_ad.doc, merge it, close
merge_ad.doc, then save the
'resulting merged doc as "merged_ad.doc"
wdActiveDoc.saveas Filename:="K:\legalper\merged_ad.doc", FileFormat:=0

Thanks in advance,
Kathy