NLS probleam

Hi

I need to change the NATIONAL CHARACTER SET from US7ASCII to WE8ISO8859P1

but when i do

SQL> SHUTDOWN IMMEDIATE;
SQL> STARTUP MOUNT;
SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
SQL> ALTER DATABASE OPEN;
SQL> ALTER DATABASE  NATIONAL CHARACTER SET WE8ISO8859P1;

I recived

ORA-01679: database must be mounted EXCLUSIVE and not open to activate

Please Help !!

yoramn_at_cti2.com Received on Mon Nov 13 2000 - 12:36:59 CST