The following article will correct the problem.
The WAB is the Windows Address Book that is used by Outlook Express.
When Outlook 2000 is installed in Internet Mail Only mode it will share the
WAB with Outlook Express and Outlook.
There is a problem with the WAB and you will need to follow the
instructions in the following article to correct the problem.
However in the article it states to reinstall Internet Explorer 4.0. In
your case reinstall Internet Explorer 6.0.
OL2000: Error Message: Windows Address Book (WAB) Is Missing WGID:220
ID: 196210.KB.EN-US
http://support.microsoft.com/?id=196210
Tammy