Slow email respond for Exchange WAN connection

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Hi,

I have problem with Outlook XP client downloading emails from Exchange
2000 over WAN connection.

Outlook XP only download the headers(the text), minus the attachment.
Does Outlook XP behaves this only in "Slow Link" mode? Is there a way
to force Outlook to download the full contents of email? Currently when
I try to open an email attachment, Outlook XP will freeze while
downloading attachment. It may takes several minutes depends on the
attachment size.

I understand that Exchange 2003/Outlook 2003 combination greatly
improves the issues with the cache exchange turned on, plus the
improved compression.

Any guides for Exchange2K/OutlookXP combination.

Thanks.