Java Swings

Can anyone please help me in correcting the following code:

package APackage1;
import java.awt.Container;
import java.util.HashMap;
import net.sf.jasperreports.swing.JRViewer;
import net.sf.jasperreports.engine.*;
public class AViewer extends javax.swing.JFrame
{
public AViewer(String fileName)
{
this(fileName,null);
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

setDefaultCloseOperation(javax.swing.WindowConstan ts.EXIT_ON_CLOSE);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);

pack();
}// </editor-fold>

public AViewer(String fileName,HashMap parameter)
{
super("View Report");
try
{
JasperPrint print = JasperFillManager.fillReport
("C:/Documents and Settings/c.smith/Desktop/Gayu/report2.jasper", parameter);
JRViewer viewer=new JRViewer(print);
Container c=getContentPane();
c.add(viewer);
}

catch(JRException jre)
{
jre.printStackTrace();
}

setBounds(10,10,600,500);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);

}
public static void main(String args[])
{
HashMap parameter=new HashMap();
parameter.put("productID",1);
parameter.put("samplenum",123.55);
parameter.put("sampledt",17/10/2011);
AViewer viewer=new AViewer("C:/Documents and Settings/c.smith/Desktop/Gayu/report2.jasper",parameter);
viewer.setVisible(true);
}
}

// Variables declaration - do not modify
// End of variables declaration

I am trying to display a Jasper Report file through a Java application. In this code, the JFrame is getting loaded, but the report is not. I am getting an error Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/groovy/control/CompilationFailedException. I dont understand why. This is the first time I am working with Jasper Reports, so please help me. And, am using NetBeans IDE 7.

Thanks.