Install and activate Chinese language in WAS 6.20 Unicode System

Hi,

I have a SAP WAS 6.20 Unicode System and I have installed the Chinese language by running the report RSCPINST following OSS note 42305. The installation was successful and no error messages. However, when I tried to logon the system with Chinese language option "ZH", the system did not display Chinese but English or German. Are there any clear steps/procedures to describe how to activate/turn on a language in a unicode system? Anyone did this before can share your experience and knowledge?

Thanks and Regards,

Yujun Ran