ParameterNameValues in runReport() Method doesn't work

Hello everyone.

I have a problem with the runReport() method, when I enter values ​​in the <parameterNameValues> section, it correctly returns a base64 but when I decode it, it only shows me the parameter label in the report I generated.

This is my request:

<?xml version="1.0" encoding="utf-8"?>

<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope"                  xmlns:pub="http://xmlns.oracle.com/oxp/service/PublicReportService"> 

<soapenv:Header/> 

<soapenv:Body>   

<pub:runReport>     

<pub:reportRequest>       

<pub:reportAbsolutePath>/Custom/Customer Relationship Management/Reportes prueba Jon/Parametros ws soap/Inf Lista de contactos.xdo</pub:reportAbsolutePath>

 <pub:sizeOfDataChunkDownload>-1</pub:sizeOfDataChunkDownload>       

<pub:parameterNameValues>