Log4j2 - custom Logger config entered in custom_wrapper.conf is not reflecting

I am trying to write a custom log file using log4j2 which comes along with webMethods10.5.
Please clarify on this. If we are adding new log4j config entry in custom_wrapper.conf. do we need to move the existing predefined entry in wrapper.conf also to custom_wrapper.conf. because I use 10.5 and it has a default entry in wrapper.conf and when I add a new config file entry in custom_wrapper.conf. it’s not getting loaded. I have verified in wrapper.log
wrapper.conf:
wrapper.java.additional.4=-Dlog4j.configurationFile="/webMethods/webmethods600/profiles/IS_default/configuration/logging/log4j2.properties"
wrapper.java.additional.4.stripquotes=TRUE
custom_wrapper.conf:
wrapper.java.additional.204=-Dlog4j.configuration="/webMethods/webmethods600/appProperties/Log4j2Demo.xml"
wrapper.java.additional.204.stripquotes=TRUE

I could not see even the log4j2.properties getting loaded in wrapper.log

Thanks in Advance!
Vignesh