Fine Grained Access Control

I keep getting the following error when i try to execute BEGIN sys.dbms_rls.add_policy('demo','my_table','my_policy','demo','my_function','select,insert,update,delete',TRUE,TRUE);   COMMIT;
END; ORA-00439: feature not enabled: Fine-grained access control ORA-06512: at "SYS.DBMS_RLS", line 0 ORA-06512: at line 2

Any help on turning on this feature would be helpful -Don- Received on Tue Jan 18 2000 - 14:56:04 CST