Outlook 2000 E-mail

My sisters computer toasted it's powersupply. When this happened she lost both hard drives also! I replaced the powersupply & put in a new WD 40gb HD. Reinstalled WinME & Office 2000. I setup User Accounts for 3 in WinME (everyone has their own screen). 3 e-mail accounts were setup in Outlook 2000 (I used information from the previous accounts (pop3, mail,comcast.net, smtp.comcast.net etc...). Each of the users are able to send/receive.

The problem: When you receive your e-mail, log off present user, then log on another user, the first users e-mail shows up in the 2nd & 3rd users inbox. I've removed/reinstalled Office 2000 (all updates are installed)still with the same problem. I've called Comcast (knew it wouldn't help, but)! I've removed the ME user accounts, setup the e-mail in Outlook , then reset the ME user accounts, still the problem. I've reset e-mail in Outlook with ME user accounts in place also, same stuffff.

Outlook Express does work, and for 2 users this would be ok, but the other user needs the power of Outlook. The Outlook e-mail can be viewed on the Outlook Express accounts, but the Outlook Express cannot be viewed on the Outlook account.

Don't think I left anything out, TIA.

Is each email account a "different" account? Or are they sharing one?

It's a single Comcast broadband connection with 3 e-mail addresses. I believe 5 are available. These e-mail addresses worked fine before the toasted psu. All of the e-mail accounts are entered correctly (pop3, mail,comcast.net, smtp.comcast.net, passwords, etc...) I've been through them with a fine toothed comb.