Transferring IMAP to deleted items?

Hi,

So i've stumbled across a simple problem at work that i can't solve for the life of me. Maybe i've been at work too long Anyway, we have a client who is using Outlook 2003 as her emai lclient and wants the items she deletes in her IMAP inbox to go directly to the Deleted Items folder and then expunge on exit. i've helped her out with the expunge on exit part but i cannot figure out how to make a deleted file go directly to that folder. They just sit in the inbox w/ a line through them until purging.

Am i missing something right in front of my face?

Thanks!

~Karyn