Problems Defining An XML DataSource

Hi there,

I'm trying to follow Lesson 1 for using XML Data in a Report here: http://msdn2.microsoft.com/en-us/library/ms345338.aspx

When I go to my local wsdl I see that the target namespace is:

http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices


I create my datasource to point to my local asmx and tested it by going directly to the URL which worked. I then create a dataset in my report which points to this datasource and has this as the query string:

<Query>
<SoapAction>http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices/ListChildren</SoapAction>
</Query>


I've created 2 parameters - Item (/) and Recursive (1).

When I try and execute the query, I get the following error:

An error occured while executing the query.
Error while reading xml response.

Error while reading xml response. (Microsoft.ReportingServices.DataExtensions)

Any help would be appreciated. Thanks.