Fictitious messages in Outlook Outbox folder

Hi,

I wonder if anyone can suggest a solution to a problem that I have.

I'm using Outlook 2003 and the program seems to have got confused. For some weeks, The Outbox seems to imply that it has an unsent item with (1) in brackets next to the folder name. However, there are no items displayed in the folder.

Today, the problem got worse. I tried to sent a document twice from MS Word using the "Send To...as attachement" option. The emails weren't received, they don't appear in the Sent items, I can't see them in the Outbox, but now it says (3) in brackets next to the Outbox folder name.

Hope that makes sense. Any suggestions as to how I clear the problem?

Tks

Paul