Hi Erva
Did you check with the third party is they made any changes to the URL that they are using to send the SOAP message? The URL should be in the below format, which then determines the interface that is triggered at runtime.
http://hostname:port name/XISOAPAdapter/MessageServlet?senderParty=name of the sender party<&senderService>=name of the sender service<&interface>=name of the interface<&receiverParty>=name of the receiver party<&receiverService>=name of the receiver service<&interfaceNamespace>=name of the interface namespace
If your test configuration is working fine, I suspect the SOAP message is being sent incorrectly.
Rgds
Eng Swee