LDAP directory in Outlook 2003 takes long time to list the address
 

Hello ,
I've configured my email (IMAP) and LDAP directory in Outlook Express,
Microsoft Outlook 2000 and Outlook 2003. Its perfectly running in both
Outlook Express & Microsoft Outlook 2000. But I am facing a problem (LDAP
directory) with Outlook 2003. all email IDs are getting from my LDAP
directory server, but it takes min 60 seconds to list all. BUT Outlook
Express & Microsoft Outlook 2000 are listing very QUICKLY(3-5 seconds only).
This problem is only in Outlook 2003. Is it possible to add some search
filters or search BASE or any registry values of Outlook 2003. ANYBODY PLEASE
HELP. Waiting 4 ur valuable advice.