I'm using Outlook 2007 under Vista Home Premium. (I should probably also
mention I imported contacts a year ago from Outlook 2000.)

Just now I opened a Contact and clicked on a linked Contact. (This 'linked'
contact is shown under the Notes field and next to the small Contact window
at the bottom of the Contact.) I go to click on that linked Contact and
receive the following message -

Cannot perform the requested operation. The command selected is not valid
for this recipient. An internal function returned an error.[end]

Why do I have this problem with Outlook 2007 when I did not have it with
Outlook 2000?

Thanks, DH