How to customize notification email subject to include more information like Change request number , Process Name

I am sending notification through activity's "send notification" option  and not through “notify by email robot”

I have modified <WT_HOME>\codebase\templates\workNotification\GeneralSubject_<Locale>.html

files by adding below scripts

<SCRIPT>
       
         beginSubject
       
    </SCRIPT>
                  Subject of Notification: 
         <SCRIPT LANGUAGE=Windchill>
         
            getPrimaryBusinessObjectName
         
         </SCRIPT>

    <SCRIPT LANGUAGE=Windchill>
       
         endSubject
       
    </SCRIPT>

But the changes are not reflecting and getting only the activity name in the subject of my email.

Do I need to set any property for this? Or any configuration in workflow activity?.