Hi I am using Lion and Outlook 14.2.3

I have an IMAP email account, and when I send/receive i get an error message: Unknown namespace.  (.Junk E-mail.)  Withinb my Tools>Accounts>settings for this account, my folder for Junk is set to Trash(Server) as is my Trash setting.

Can anyone tell me what i need to do to get rid of this error.

Many thanks

Alex