I had a problem with Outlook and the WAB.DLL a little while ago. I
reinstalled Outlook, but that didn't work so here is what I had to do to
correct it.
I uninstall Outlook Express. Then I upgrade to the latest version of
Internet Explore which reinstalled the latest Outlook Express, (I guess if
you already have the latest version of IE then simply reselect Outlook
Express to reinstalled it). After this process I relaunched Outlook and
my problem was resolved.
It appears that Outlook will not function correctly without Outlook
Express.