Can't use Contacts folder following move from XP to Windows 7

I purchased a new computer on Windows 7, installed Office 2003 and copied
across all the files including the .pst ones from my old computer which was
on XP. Outlook is working fine in every respect except when creating a new
message within Mail: it does not recognise the names from my Contacts folder
(error message "Microsoft Office Outlook does not recognize xxx" . If I open
the Contacts folder and select a contact, I can create "New Message to
Contact".

"lynbristol" wrote in message
...
I purchased a new computer on Windows 7, installed Office 2003 and copied
across all the files including the .pst ones from my old computer which
was
on XP. Outlook is working fine in every respect except when creating a
new
message within Mail: it does not recognise the names from my Contacts
folder
(error message "Microsoft Office Outlook does not recognize xxx" . If I
open
the Contacts folder and select a contact, I can create "New Message to
Contact".

So how did you connect your old pst file to your new instance of Outlook?