I assume you have created WSD (as Provider) and exposed a IS service (Operation):
Is this your folder:servicename (wsdns1:inPayload)??
What settings you have for eg:
Directive: ws
SOAP version: SOAP 1.1
Transport: HTTP (Soap-HTTP)?? Note:SOAP-RPC is deprecated in 71
Use and Style: Document-Literal or RPC-Literal?
#webMethods#Flow-and-Java-services#Integration-Server-and-ESB