How to edit email attachment in PO notification

 Dear, all

We just implemented Oracle Email Notification Work Flow. It works normally.

But somehow, we want to edit the information and layout of the attachment.

We created rdf and xml report. We got the output but it's blank.

I guest it because system could not grabbed the parameter (PO number).

May somebody help me how to manage EBS for we get an output  as our xml template report?

Thanks before.