If you're trying to create a message form from an existing item, you must turn off WordMail as your editor before you create the item -- Tools | Options | Mail Format.
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Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
Microsoft Outlook Programming: Jumpstart
for Administrators, Power Users, and Developers http://www.slipstick.com/books/jumpstart.htm