Similar problem solved
Emad, June 23, 2011 - 9:11 am UTC
Hello,
I have faced the same problem before with Oracle 9i. I have followed the steps in the Oracle Support notes:
Database Character Set Healthcheck [ID 225938.1]
Changing the Database Character Set ( NLS_CHARACTERSET ) [ID 225912.1]
They will be very helpful to you.
Regards,
Emad