you haven't mentioned what version of Outlook you are using. Please do in
your posts.
Run the Inbox repair tool on that archive and see if it checks out ok.
More info can be found here: http://support.microsoft.com/default.aspx?scid=kb;en-us;272227
If that fails to fix the problem then check the size of the archive and
report back here.
You might also try and archive to a new file but it won't fix accessibility
problems with your existing archive if there are any.
