User defined Message search not working

I'm using SAP PI 7.31 Java stack only ( no GUI). I'm trying to configure User-Defined message search in my PI system but its not working.

I followed the SAP document " How to configure and execute used defined message search"

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/803b22cf-ad75-2f10-0790-da055f2e8c0e?overridelayout=true

from Step 7 to 7.6 ( excluding 7.3 Define Namespace prefix).It is not working when I test it.

Are there any additional steps I need to perform for this? Please help.

Thanks in Advance.