Entourage - can't set Group as recipient when creating draft window

We recently upgraded to Office 2008 and now scripts that specified a Group (distribution list) as recipient don’t work. The group name shows in the “To” field with a question mark alongside even though the Group exists in the Address Book.

tell application "Microsoft Entourage"
	activate
	set theGroups to every group
	set theContacts to name of every group
	choose from list theContacts
	set mailTo to result
	set theMessage to "Test Message"
	
	set theMsg to make new draft window with properties {subject:"Images for upload", content:theMessage, recipient:mailTo}
	
end tell

Any ideas?

Thanks

Model: iMac
Browser: Firefox 3.0.5
Operating System: Mac OS X (10.4)