Ocfs users - Jul 2003 - Error: Feature not enabled

Hi,
My RAC installation (Redhat AS 2.1, OCFS, External Firewire) went okay
to the point of creating the database.
But when i wanted to startup the database:
- sqlplus /nolog
- startup

I get the error: Feature not enabled: Real Application Clusters.

Did i do something wrong? I still can't figure this thing out yet.
Thanks.

Regards,
Faisal