Asynchronous Testing

Hi,

I'm new to using soapUI. I had no problem testing a regular service that responds to requests synchronously.

However, now I'm trying to test an asynchronous service. Here is what I have --- a RequestBinding and CallBack binding in the same WSDL. How do I go about testing this service?

I want to send the request and then send a response from the CallBack binding back. Thanks for any advice and help you can offer.