Disc access when scrolling through my emails

[eisbaeramsel]

Hi,

I have a problem with my outlook 2003 (Win XP): Every time I scroll
through the list of emails outlook accesses the hard disc even if I do
not open the email and the preview window is deactivated. The result is
a pause before I can go to the next email in the list.

Surprisingly the problem is solved if I open the email and close it.
Next time I navigate to that email in the list there is no disc access
(seems to be cached). Unfortunatly if I close Outlook an reopen it, the
whole story starts from the beginning...

Does anybody have an idea ?

Thanks
Urs