Office XP

I’m attempting to import may addressbook from Office 2000, DL included. All entries are transferring except the DL. I should add that this is a new computer setup. Going from Win/Office 2000 to Win/Office XP. I’ve tried file types, “Comma Separated Values (Windows), Microsoft Excel, and .pst file (which doesn’t work). Any suggestions has to how to go about getting this done….Thanks