Outloo Express can’t see Mail Server

I am working with a WIN98 workgroup using an NT workstation as the access to the DSL.

The problem is I put a new WIN98SE computer in the workgroup and can connect to the network and the internet but can’t connect his email account to the email server on this particular machine. I can connect his email account from another computer on the same workgroup.
I have checked and rechecked his IP, DNS, gateway, Proxy settings, email account info.

Is there account info on the NT machine I need toconfigure?

Any help would be appreciated,

tjmm101