How to listen for the call back response.

Hi,
I have started working on soapui few months back.We were testing synchronous, asynchronous webservices. Earlier for one of our asynchronous web service , we used to listen for the response sent by the web service using mockresponse test step.That time the service was sending the call back response to client's IP address.So it was working fine.But now they are sending the mockresponse to some other address that we are mentioning in soap request in WS-A (reply to )section.
Now my question is can we still listen for the mockresponse from our system that is sent to some other host.

I tried replacing the value of host in mockresponse teststep with the address where mockresponse is sent now but it was not working.

Please help

Thanks
Vipin