Trying to set mail merge data source for docx, Word hangs

I'm trying to hook a Word docx (in Word 2010) to an Access accdb (access 2010)
I open the Word docx, and from the "Mailings" tab, I click "Select Recipeints", then "Use Existing List".
Then in the "Select Data Source" dialog, I browse to and then select the accdb.
Then it hangs.
Sometimes the dialog where you select the table or query will finally pop up after 15 minutes or so.
But other times, it hangs for so long I just end the process in Task Manager.
Any idea what might be happening there?

Mark LaGrangeAsked:
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crystal (strive4peace) - Microsoft MVP, AccessRemote Training and ProgrammingCommented:
perhaps try it when the database is closed?

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Mark LaGrangeAuthor Commented:
Well, that worked a little better, but it still took 11 minutes (db closed; both the db and doc down on the local C: drive).
This is a decent machine - 3.30 GHz, 4.00 GB memory. Everything else going pretty zippy...
Mark LaGrangeAuthor Commented:
ok, Crystal; I'm here, trying to close out this question and give you the points. But I don't see how to do this this now, in this constantly-improving Experts Exchange...  Didn't there used to be 2 buttons on each response to select the best and assisted responses?
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