Problem accessing contacts

I am using Outlook 2003 with Exchange server and Word 2000.

All my contacts are stored in Outlook, some with emaill adresses and some
with only mail adresses.
If I open Outlook contacts I see all contacts, but if I go to adress book in
outlook I only see email contacts.
When using Word, if I go to envelopes & labels outlook contacts are
selected, but I am only seeing email contacts! if a contact has a mail adress
only then it does not appear to Word in contacts even though I know it does
exist .

Any suggestions?

Thanks