Automatic start of database instance with Oracle 8i on Windows 2000 server

We have an Oracle 8i database running on Windows 2000 server. I want to put the database instance starting automaticaly on Windows startup. The Oracle database service and TNS listener service are starting automatically at startup, but the instance is not starting. What could be the problem?

Check your alert log. If there are no errors there, then the service probably isn't set to start the instance automatically. On oradim, there's an option for the startmode. You may need to edit that with some syntax similar to this (not sure if this is it exactly since I don't run Oracle on Windows):

oradim -edit -SID SIDNAME -startmode srvc,inst