Testing application on SMP 3.0, does not work create Sales Order

Hello!

I am developing one Android Native application that will use an OData services.

I am following the tutorial How To... Create Complex Business Entities using the Gateway OData Channel, when I did the test with REST Client on Google Chrome, I had a successful response, when I try to create one Sales Order, I had this response 201Created, but Sales Order does not create in the backend, this is the xml response:

<entryxmlns="http://www.w3.org/2005/Atom"

       xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"

       xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices"

       xml:base=".../sap/opu/odata/sap/salesordercw/">