Use Soap UI response in application

I test an application which uses 3rd party webservice to get responses. It is quite hard to get test data from the customer so I thought SOAP UI mocking service can help me.

But I cannot find any tutorial or concrete example. My idea is that 1. I generate mock service and response I needed 2. Replace application configuration to listen to my mock service instead of real one 3. Run application and get mock response.

But this failed, the application didn't start with our MockService (running on local machine)

Or could anyone probably suggest me, how to replace web service responses with ones I needed for testing.