ORA-12500 setting up database connection

I have just installed Oracle 9i on an NT4.0 server. I am attempting to set up my first database. I used the Database Configuration Assistant to create a "general purpose" database with default values. After the create process runs, I try to configure a net service name on my workstation (Win2k) to connect to the database. When I press the test button, I get the message "ORA-12500: TNS:listener failed to start a dedicated server process". Can someone point me the right direction in getting this set up?

Thanks.

--
Eric Logsdon
ELogsdon_at_CooperativeTechnologies.com