Sender REST Adapter for enhanced service interface

Hi,

I have a REST->PO->SOAP scenario and I'm having an issue with a standard ESR service interface that got enhanced. First I created a Data Type Enhancement and the added portion in the payload looks like this in PO:

<ns1:AdditionalInfo xmlns:ns1=URL>

<VendorNumber>12344</VendorNumber>

</ns1:AdditionalInfo>

The problem is I cannot get my JSON Payload to populate the new added section with the (ns1: and xmlns:ns1=URL). I tried different ways including the further XML/JSON conversion rules on the adapter but no luck. Anyone was ever successful populating an enhancement on a service interface with the addition of the ns1: and xmlns:ns1=URL on the XML tag name?