Print Envelope does not pick up address from letter

Hi,

(Word 2003. Win XP, SP3)

I have always been able to address envelopes just by highlighting the
address in a Word letter, and clicking on the envelope icon on the toolbar.
The delivery address would appear in the top panel of the Envelopes and
Labels print dialog window. Today, the address does not appear in the
Delivery Address panel. I addressed and printed a bunch of envelopes
yesterday without any problems.

I don't know if this is a coincidence, but I installed the Windows XP SP3
upgrade just before this problem arose. During the installation, a small
window opened with a message saying something like 'upgrading Outlook
Express 6.' However, I am not using the OE Address Book. I am simply using
the address in a letter.

Also, I noticed that the autocomplete feature of Yahoo Mail no longer works.
Could this be related to the envelope addressing problem?

Any clues?

Thanks.

Orrie