[Jasper Reports] Export PDF file, I'm crazying!

[Salvo Montalbano]

Hi all,

I'm developing my first application using jasper reports library (v4.1.3).
I created the report using iReport 4.1.3 and I wrote the following class:

import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.design.JasperDesign;
import net.sf.jasperreports.engine.export.*;
import net.sf.jasperreports.engine.xml.JRXmlLoader;
import java.util.*;
	public class JasperTest
	{
		public static void main(String[] args)
		{
			String fileName = "C:\\report7.jrxml";
			String outFileName = "C:\\report7.pdf";
			HashMap hm = new HashMap();
						
			try
			{
				JasperDesign jasperDesign = JRXmlLoader.load(fileName); 
				JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); 
				JasperPrint print = JasperFillManager.fillReport(jasperReport,hm,new JREmptyDataSource());
				
				JasperExportManager.exportReportToPdfFile(print,outFileName);
				
				System.out.println("Created file: " + outFileName);
			}
			catch (JRException e)
			{
				e.printStackTrace();
				System.exit(1);
			}
			catch (Exception e)
			{
				e.printStackTrace();
				System.exit(1);
			}
		}
	}

But when i execute this application, the following exception occurs:

Exception in thread "main" java.lang.NoSuchFieldError: PRINTSCALING
	at net.sf.jasperreports.engine.export.JRPdfExporter.exportReportToStream(JRPdfExporter.java:466)
	at net.sf.jasperreports.engine.export.JRPdfExporter.exportReport(JRPdfExporter.java:362)
	at net.sf.jasperreports.engine.JasperExportManager.exportReportToPdfStream(JasperExportManager.java:163)
	at JasperTest.main(JasperTest.java:34)

I can't understand where is the bug.
I hope anybody can help me.
Thanks in advance

SM