This may apply to you. Hope it helps, though you didn't say which OS or version of Outlook you are running.http://www.emailaddr...ook/repair.html
I also read this on a site:
Perform an Outlook repair. Two methods to accomplish this are available. Go to Outlook and select 'Help | Detect and Repair', or insert the Microsoft Office CD and select to repair Outlook. Of the two methods to repair Outlook, the Office CD repair is slightly more thorough.
Other web-page to look at which may help:http://www.kbalertz....kb_Q241817.aspx