Outlook 2000 won’t let me view contacts

I have a user that upgraded a laptop. I have given his old laptop to another user. Its 98SE running Office 2000 on an NT Exchange server. I switched his user name and password out fine. But when he opens his address book the contacts are pointing to the original users contacts. And I can’t find out where I can go to change the name at. I’ve reinstalled Outlook, and nothing. I went to properties and even the help wizard. Nothing. Is there a registry entry I need to change? I’ve also looked under profiles with no luck.
Thanks in advance,
Jim