XML Datasource problems

I am passing a valid XML set of data to the constructor, but the report ends up blank.

The xml object is an org.w3c.dom.Document that was created using dom4j.


JRDataSource jxmlds = new JRXmlDataSource(xml);
// Fill the report
JasperPrint jp = JasperFillManager.fillReport(report, params, jxmlds);