can't load outlook 2000 database in outlook 2003

Hi folks:

 I just got a new laptop and installed MS Office 2003. I wanted to use my Outlook 2000 database in 2003. So I copied the outlook file on to the lap top and stored in the same folder as archive. but this has not worked as when I bring up Outlook (2003) it does not bring up my old folders/emails from Outlook 2000. What am I doing wrong here?

thanks in anticipation