when we create a Data service using Wso2 Data service its generate two wsdl files.
This is first one
This is second one.
Anyway when i test the servie using SoapUi i used first wsdl file.It gives the expected result when i test using first wsdl file.
please see the below example which i used to create this data service.last part of this example shows it generate two wsdl files.
Data Service example