MS Office Outlook 2007 Address Book

I have Outlook on my personal home computer set to use my contacts folder as the Office Address Book (OAB). When I display the contacts page I see the names of my contacts as First Last... this is as desired. However, when sending messages if I click on the To: button it opens a window titled Select Names: Contacts... this select listing is not in First Last name order and I don't seem to be able to get it to display that way... What am I doing incorrectly and how do I fix the situation so that both listings display names as First Last?

thanx,

ken