Outlook password problem

[Mr.WeakTight]

I had Outlook Expres going and everything was okey dokey. then I enrolled in an online school and they required that I buy office 2007 which includes Outlook. I still have Outlook Express and it knows my password and it will retrieve and send messages. but when i run Outlook it keeps popping up a box asking for the password. I'm pretty sure it would be the same password - I think I know which of my passwords it is b/c it's x characters long and there's only one of the typical passwords that I use that's 10 characters long. also, that is what I recall setting the p.w. to and I would've had no reason to change it.

so I go put in the p.w. to OUtlook but it still constantly pops up that box and it won't send or receive.

and LOL at the school who said if I needed help with Outlook I neede to contact Microsoft.