Can't Receive Mail On Entourage 2004


I recently purchased Office:mac 2004. I can receive mail on my Outlook Express mailbox but can't send mail. I have a POP dial-up account with Earthlink. The outgoing path I entered is:

I don't know why this works with my other mailbox but not Outlook. Also, I don't know how to get back to the setup screen for Outlook or what changes need to be made.
Wait, what OS are you using... Outlook Express only runs on OS 9. And why did you buy Office if you're going to use Outlook?