exception:please help

[John Mclain]

hello there..

i tried to run five japplet classed in a jsp page and four of them have been got embedded in that jsp but one of them(Send_data) haven't indeed i got this exception in java console of IE7.0.

java.lang.ClassFormatError: Incompatible magic value 0 in class file Send_data
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

below is the Send_data class in which Personal_information is another class in the same directory where method return_props is defined.

  
  * Send_data.java
 *
 * Created on November 4, 2007, 12:52 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.util.*;
import java.applet.Applet.*;
import java.io.*;
import java.net.*;
 
/**
 *
 * @author Santosh Tripathi
 */
public class Send_data extends javax.swing.JApplet implements ActionListener  {
    
    private JPanel jContentPane=null;
    private JButton postdata=null;    
    //public String student_name=null,fathers_name=null,dob=null,cont_no=null,cont_email=null,cont_address=null;
    
    /** Creates a new instance of Send_data */
    public Send_data() {
    }
 
    public void init() {
        super.init();
        this.setSize(700,100);
        this.setContentPane(getJContentPane());
    }
    
   public JPanel getJContentPane(){
       
        jContentPane=new JPanel();
        jContentPane.setSize(700,100);
         jContentPane.setLayout(null);
        postdata=new JButton();
        postdata.setFont(new Font("Verdana", 1, 11));
        postdata.setText("Next");
        postdata.setBounds(new Rectangle(625,70,70,20));       
       
        
        jContentPane.add(postdata);
        postdata.addMouseListener(new javax.swing.event.MouseInputAdapter() {
            public void mouseClicked(MouseEvent e) {
                super.mouseClicked(e);  
                Personal_information piob=new Personal_information("yes");                
               
                senddata(piob.return_props());
                
            }
 
            public void mouseMoved(MouseEvent e) {
                super.mouseMoved(e);
            }
            
        });
      return jContentPane;  
   }
  
 public void senddata(Properties std_details){                      
      
    try{ 
        URL appletURL = getCodeBase();
        String strHost = appletURL.getHost();
        String strPort = String.valueOf(appletURL.getPort());
        String strProtocol = appletURL.getProtocol();
        int portNumber = Integer.parseInt(strPort);
        String strwp ="http://localhost:8084/UASProject/Registrationform.jsp";        
        URL jspURL = new URL(strProtocol,strHost,portNumber,strwp);
        URLConnection jspCon = jspURL.openConnection();
        jspCon.setUseCaches(false);
        jspCon.setDoOutput(true);
        jspCon.setDoInput(true);
        //jspCon.set
        OutputStream outstream= jspCon.getOutputStream();
        ObjectOutputStream oboutStream = new ObjectOutputStream(outstream);
        //PrintWriter out = new PrintWriter(oboutStream,true);
       // String postData= "?xmlText=" + URLEncoder.encode(genXml(),"UTF-8");
        //out.print(postData);
       // out.flush();
        String strLength = String.valueOf(oboutStream);
        jspCon.setRequestProperty("Content-Length",strLength);
        jspCon.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
        oboutStream.writeObject(std_details);
        URL tempURL = new URL(String.valueOf(jspURL));
        getAppletContext().showDocument(tempURL,"_blank");
 
     }catch(Exception e)   {}
 
    
  }
 
    public void actionPerformed(ActionEvent e) {
    }
 
   
}
 
please tell me how can i fix this problem? however i tried to fix this by reformatting and recompling and moreover reembedding the Send_data class as whatever i know about this exception.
 
thanx in advance