Oracle Apex Dynamic Where Caluse

I have a report file in JasperReports, which contains dynamic Where clause as parameter. When I execute a preview from my report I get the correct number of records

Nevertheless when I execute the same report from my application on Oracle Apex, It returns a blank page with no error messages. I need the same information as the preview report in Jasper.

¿Any ideas why I don't get the correct information?

Thanks in advance