How do I change the SOAP based services to REST based?

Hi,

I have a sample webservice url developed in .NET 3.5 which contains a simple method that will add two numbers. Here's the url.

http://localhost:5793/Service1.asmx?wsdl

When I create a project in SoapUI Pro 4.5.0, I'm getting the SOAP based services. Could you tell me how to convert SOAP based service to REST based?

Thanks in Advance!!!