I've just transferred my Office 2000 program, including Outlook which I used for organiser functions only, from my old Windows XP system - where it was working perfectly - to my new Vista Home Premium one. Having reinstalled the program I can get Outlook running, and associated with my previous application data for Calendar and Contacts which I can now view, but when I try and add new entries to either I get the following error message: ‘An error occurred whilst attempting to open the Windows Address Book. Unable to find the WAB DLL.’ A search confirms it is not on the new system. So I am prevented from adding any more entries. The oddity is that a search of my old system reveals that the same DLL file isn't on that computer either - but it's still functioning properly! Can anyone suggest how I can correct this new fault? Many thanks Anthony