SoapUI mock response

I´ve created a soapaUI project and it simulates methods of my WSDL properly.
Now I want to create some mock responses by scripting.
I can send strings to client side, But I don´t know how to send byte[] to client side.
By sending request inside the soapUI, evrything seems to be ok. but when I try to make a call to service from outside the soapUI,
it failes to send byte[] to client.
Please tell me if you have any idea.

Thanks in advance.