WS Navigator gives http ok, but no message hitting Sender adapter

Hi,

I am using WS Navigator to test a web service that has been deployed from NWDS. The test tool is giving a HTTP 200 OK response but I cannot see anything hitting the sender adapter:

HTTP/1.1 200 OK

server: SAP NetWeaver Application Server 7.41 / AS Java 7.40

transfer-encoding: chunked

content-type: text/xml; charset=utf-8

date: Wed, 02 Apr 2014 09:57:00 GMT

Set-Cookie: <value is hidden>

The scenario is 3rd party -> PI -> proxy. The iFlow is fully configured with a sender SOAP and receiver SOAP (XI 3.0) adapter. The proxy is not currently active but I would still expect to see a message being routed to the receiver.

Should I be able to see the message hitting the sender adapter?

Thanks

Che