Account user problem with Office 97 on Windows XP

I have upgraded my workstations at my business to PCs running Windows XP Pro. I created a administrator account, and limited accounts for all my employees. I installed my licensed copy of Office 97 under my administrator account. When my staff logon under their limited user accounts, they can open Excel and Word. However, if they open Outlook, then get a message "program not registered properly. Please run setup again. You don't have appropriate permission to perform this operation." If I change the limited accounts to administrator accounts, then everything works. This did not occur when I ran workstations using Windows 2000. Please help.

Stephen Hsieh