Outlook 2002 Slow Retrieval of emails

[Tom]

I've been experiencing a great slow down in how long it
takes my Outlook 2002 client when retrieving my emails.

There is about a 15-30 delay for retrieving each new email
from the exchange server.

I've installed SP3, and I've made sure that Messenger
service is turned off in Outlook.

I've tried enabling and disabling Windows Messenger -- and
I've tried enabling and disabling my Microsoft Messenger
6.2. Nothing is making a difference.

Help!