Can't Find email address in Address Book
 

I am using Windows XP Pro with Outlook 2000 SP-3 (9.0.0.6627)
and Address book 6.00.2900.2180

I am having a problem with email addresses. when I write an email I choose
the contact and there name appears in the To: textbox but when I click send I
get the response "The Following recipients do not have e-mail addresses: ..."
But they do have email addresses. However when I look in the address book the
email addresses are missing. Why is there a difference between my Contacts in
Outlook and the Address Book. My Contact's Folder is set to "Show this folder
as an e-mail Address" as default. This check box is checked and disabled.

What is more... if I type the email address directly into the To: textbox
the email address is replaced with the name of the contact who has that email
address, but still, when I try to send it give me the same message.

What can I do to correct this?

Joseph