Outlook Express Auto-Complete

My Issue is that I can’t seem to remove an email address from my Outlook Express autocomplete. I have tried deleting the email address when the auto-complete highlights it in the To box and also cleared AutoComplete from Internet Explorer. Nothing seems to work. With MS Outlook, there is a file you can delete to clear your Auto-Complete. How do you clear or delete an email from Outlook Express?

Any help will be greatly appreciated.
Thanks