SSRS 2016 cannot set parameters for web service query

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reporting-services

webservice

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I have a query in SSRS 2016 which is working perfectly and returning the correct data from a webservice on my live webserver when I hard code the parameter value in, however, I need this to be dynamic, and to be a parameter passed into the report itself. I cannot work out what the syntax for this is though, as nothing I have tried seems to work.and always give me a null answer.

As an additional detail I commented that my webservice is created in Glasfish JSP.

My parameter is clave_usuario that gives me the (=User!UserID)

This is my syntax for my dataset:

<query>
<soapaction>http://ws.ciu.ds.banxico.org/ConsultaADWS
<Method Name="getGsUsuario" Namespace="http://ws.ciu.ds.banxico.org/">
<parameters>
<Parameter Name="clave_usuario">Parameters!clave_usuario.Value


<ElementPath IgnoreNamespaces="true">*


If anyone knows what the correct syntax is for this, I would be very grateful

What I have tried:

SSRS 2016 Cannot set parameters for Web Service query