Hi Szusi,
You may still use the selector method if this is what you wish to use, but the syntax would be a bit different. You could use the sample code you have provided. However, you have to associate this predicate to your selector.
Could you confirm if you are encountering an error with the sample code you have provided? If yes, could you provide your code for downloading the report and the complete SOAP request and response logs generated via Reply privately to author?