Your issue suggests a corrupt profile.

Create a new one under Control Panel-Mail Icon-profiles. Create a new
one, do not copy your old one.

--
Milly Staples [MVP - Outlook]

Post all replies to the group to keep the discussion intact.
ALWAYS post your Outlook version.
How to ask a question: http://support.microsoft.com/KB/555375


After furious head scratching, Coach17 asked:

| Hello All, This is my first post here and I hope someone can help.
|
| I am having trouble with auto fill when creating a new email. If I
| type in someones email address in the TO section it will work again
| if I have not closed Outlook 2007. When I open Outlook again the
| email addresses I have typed previously do not come up and they
| should. I do have it set up properly. I have suggest names on the TO
| CC and BC under Tools Options.
| From some research I believe it has to do with the NK2 file. I have
| done a complete search on my machine and it does not exist. I am
| using Windows XP Home
| __________________