SRM-XML data modification

Hi

I have a requirement to modify PO price data before it convert to XML-  to XI system.

Ex- Price per unit, It should be always one-  Example - 10 EA = 80 $, I wanted to modify it as 0.8 per 1 EA in the XML file..

We able to achieve this in PO Change & in XML structure through XML BADI,, How ever some reason this isn't working for New PO's, It's not passing through that BADI... Looks like different place to code...  Any help appreciated..

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BR
Srrimaan