Outlook Today hangs

I'm running Exchange 5.5 on a Windows NT 4.0 network - email client is Outlook 98. One user noticed that his emails were 3 hours behind so I checked his time zone and it was set to Pacific time, we are Eastern time. I changed his time zone to Eastern and now he cannot access Outlook Today. He can pull up all other folders, send and receive email, but when he when chooses Outlook Today it hangs. When I changed the time zone back to Pacific, Outlook Today displays with out any problems. Any advice?

Thanks