Since my wife and I began using internet calendar sharing in Outlook 2007, we
have both been receiving the following error message upon mail client launch
and periodically during Outlook sessions.  

 http://rilinterface.com/images/SupportIssues/Outlook/LiveSignin01.jpg

Removing the shared calendar does not resolve the problem.

Also, creating a Windows Live account for the email address to which my wife
sent the internet calendar invitation and associating it with my Windows XP
user account failed to resolve the problem.

I also checked the settings at:

 Outlook > Tools > Account Settings > Internet Calendars

and

 Outlook > Tools > Account Setting > Published Calendars

Neither offers any insights into what might be wrong.  These settings also
do not map to the UA text in the error message.  I have no idea what

How do I do away with this error massage and continue to use Internet
Calendars through Outlook 2007?

Thanks!