Try resetting you view on the folder;
View-> Arrange By-> Custom...-> Reset Current View
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
Outlook FAQ, HowTo, Downloads, Add-Ins and more
Real World Questions, Real World Answers
"Woody" <Woody@discussions.microsoft.com> wrote in message
> I am getting the following message when clicking on Sent Items in Office
> The Messaging Interface has returned an unknown error. If the problem
> persists , restart outlook.
> I have restarted outlook hundreds of times but it is still the same.
> Email still appears to work OK, it's just the sent items.
> Has anyone got any ideas.