error when compile report

Hi, I compile my report in my code as

JasperReport jasperReport = JasperCompileManager.compileReport(reportSource);


and NetBeans show this message

2.11.2006 14:02:36 org.apache.commons.digester.Digester getParser
SEVERE: Digester.getParser:
org.xml.sax.SAXNotRecognizedException: http://apache.org/xml/features/validation/dynamic
at gnu.xml.aelfred2.JAXPFactory.setFeature(JAXPFactory.java:102)
at org.apache.commons.digester.parser.XercesParser.configureXerces(XercesParser.java:185)
at org.apache.commons.digester.parser.XercesParser.newSAXParser(XercesParser.java:138)
at org.apache.commons.digester.ParserFeatureSetterFactory.newSAXParser(ParserFeatureSetterFactory.java:71)
at org.apache.commons.digester.Digester.getParser(Digester.java:692)
at org.apache.commons.digester.Digester.getXMLReader(Digester.java:899)
at org.apache.commons.digester.Digester.parse(Digester.java:1647)
at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:238)
at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:225)
at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:213)
at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:167)
at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:151)
at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:142)


Where have I error, please? Thank