#1 Error creating sax parser

[MIrko Bruzzone]

Hi every-one!
I'm a new in that support, but not new in use JasperReport?.
For 3.0.0 version my java code to export PDF was good, now, with 3.6.1 version (last release) my code isn't good!
When it exec "JRXmlLoader.load" I encounter this error:
net.sf.jasperreports.engine.JRRuntimeException: Error creating SAX parser
cause to:
org.xml.sax.SAXNotRecognizedException: http://java.sun.com/xml/jaxp/properties/schemaLanguage

and I don't know to do?

I use my old jrxml.

Can anyone help me to solve this problem!??

Thk in advance!