Can't connect to Exchange 5.5 after reinstalling

[Paul Erickson]

All was working fine, but then I had to reinstall Windows
2000 to fix a boot problem.
Now when I go into Outlook 2003, it says it can't connect
to the Exchange Server (5.5 with SP4). I've deleted the
email profile, and tried to add a new one. When I go into
the Mail control panel applet to setup a new profile, it
tells me that the Exchange Server is not available. I can
enter the server name and email account, but when I Check
Name, I get 'Outlook could not log on'.

I've reinstalled Office 2003, but still doesn't work. I
can connect to the Exchange Server from a different
computer, so I know that the server and the account are
active and valid.

Any ideas?

Thanks.