Web Service Performance Testing Vs 2013 Ultimate

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C#

testing

WCFServices

Hi all,
I have just finished a web Service(.SCV) with 5 methods and it's running with out any problem by using WCFTestClient. I successfully invoked all methods with the right expected result.

In order to insure of performance and stability of all methods, i'd like to make some stress and load test by using the Microsoft Web Performance and load testing with visual studio 2013 (Ultimate edition). looking on the web the step to follow i found to this tuto

By submitting Xml Request of my first simple GetData() Method

which look like :

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Body>
    <GetData xmlns="MyWebService" />
  </s:Body>
</s:Envelope>  

According to this other Msdn tuto (but for .asmx Web Service not for .SCV) i supposed to get an xml response as a result.
Unfortunately have no any XML response or still not understand how to get the result of this method. maybe I missed some setting or parameters. Some help or some link will be nice.
Thank you