searching contacts

[Kunal]

I am using Outlook 2003 with SBS Server 2000.
When I try and serach for the outlook record of a contact
from my global address book for an email by right
clicking on the email address gives me the error below.
==================
This error can occur if you click Look Up Contact for an
e-mail ID of a user who is not part of your local
contacts list.
If you have a Microsoft Exchange e-mail account this
error may appear because the Look Up Contact option
searches the local Contacts folder and does not search
the Global Address List.
To avoid this error, search the Global Address List for
the name by double-clicking the name, or right-clicking
the name and then clicking Properties.
====================

Can you help?
Thanks
Kunal