2007 AutoCorrect & AutoFormat not working now

The 'th' (5th) and the smiling face for were working but have stopped. I
have looked at the settings and they are still selected as follows:

Tools|Options|Mail Format|Editor Options|Proofing|AutoCorrect Options| and
then
AutoCorrect - selected "Replace text as you type" followed by a default
table of items.
and
AutoFormat As You Type - all 6 "Replace as you type" items selected.

Other selections (fonts, spell check, etc.) continue to function properly.

How to fix this?

Thank you,

Norman Castel