ReportingService2010.PrepareQuery() returns an error : "The input XML does not conform to the schema. XML grammar is described in the API documentation"

Hi,

I'm trying to create a datadriven subscription for a report using ReportingService2010 webservice. The Sql Server is 2012 version.

I have done it pretty much like in this example : https://technet.microsoft.com/en-us/library/reportservice2010.reportingservice2010.createdatadrivensubscription(v=sql.105).aspx

But when I'm calling

results = rs.PrepareQuery(delivery, dataSetDefinition, out changed, out paramNames);

it gives the error message " "The input XML does not conform to the schema..."

This is propably due to wrong namespace in the dataobjects like in datasource (see below)

/// <remarks/>
    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Xml", "4.0.30319.34234")]
    [System.SerializableAttribute()]
    [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.ComponentModel.DesignerCategoryAttribute("code")]
    [System.Xml.Serialization.XmlTypeAttribute(Namespace="http://schemas.microsoft.com/sqlserver/reporting/2010/03/01/ReportServer")]

According to this : http://stackoverflow.com/questions/5462425/how-to-use-reportingservice2010

the namespace should be : xmlns="http://schemas.microsoft.com/sqlserver/reporting/2006/03/reportdatasource

instead of http://schemas.microsoft.com/sqlserver/reporting/2010/03/01/ReportServer

for this to work. How do I go about to fix this!?

Kind regards, Wilson