standard http "Status Code" did not send back in the http header.

Hey, gurus,

Our vendor send us the cXML invoices to our PI/XI server with Asynchronous method but they can not find the standard http "Status Code" in the http header.

This was what our vendor saw.

msgguid= 005056A0751D1EE68EC394A4B8D46572

Content-Length= 0

Content-Type= text/html

Set-Cookie= sap-usercontext=sap-language=D&sap-client=900; path=/

Server= SAP NetWeaver Application Server / ABAP 731

Does PI/XI send a standard http "Status Code" back to the sender in Asynchronous method?

Do I need to set up anything to send a standard http "Status Code" back?

Thanks!

Fisher