Central PI Message Search

I am trying to use this feature to search the messages based on attribute and value.

But I am not getting anything in search. Does someone have any idea how exactly we can use this feature to search messages in SAP PI using custom attributes. I tried with attribute with complete path as well with attribute name only for recent messages in SAP PI but I am not getting any result back.

Is there any thing else need to be configured to get the messages using value from Payload.

I have already read Using central user-defined message search - Technical Operations - SCN Wiki.

Thanks,

Vertika