Hi all.. i need help and its very urgent

Actually, i want to develop an application that can run "shctasks" under WinXP. I already develop it but there is a problem that the task will show as running but nothing happens. If I don’t end the task it continues to show status of running until the default 72 hours expires. If I open up Task Manager, click on Process tab, I can see the job (what the schedule task is suppose to run) is running but its showing CPU usage as zero. Here i paste my full source code, please help me, thanks.

code: application_lock.java

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

public class application_lock extends JFrame implements ActionListener
{

JLabel lb1;
JLabel lb2;

JPasswordField tx1;
JComboBox tx2;

JButton b1;
JButton b2;
JButton b3;

char c='"';

application_lock()
{

super("Neural Application Lock Configuration Tool");
//getContentPane().setBackground(Color.white);
getContentPane().setLayout(null);
setLocation(200,100);
setVisible(true);
setSize(500,200);
setResizable(false);

addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{


}
});

lb1=new JLabel("Enter Your Windows Account Password");
lb1.setForeground(Color.black);
lb1.setBounds(20,30,250,30);
getContentPane().add(lb1);

tx1=new JPasswordField(20);
//tx1.setEchoChar('*');
tx1.setForeground(Color.black);
tx1.setBackground(Color.lightGray);
tx1.setBounds(270,35,150,20);
getContentPane().add(tx1);

lb2=new JLabel("Select Idle Time (max 999 minutes)");
lb2.setForeground(Color.black);
lb2.setBounds(50,70,250,30);
getContentPane().add(lb2);

tx2=new JComboBox();

for(int k=1;k<=999;k++)
{

String text=String.valueOf(k);

tx2.addItem(text);

}

tx2.setForeground(Color.black);
tx2.setBackground(Color.lightGray);
tx2.setBounds(270,75,150,20);
getContentPane().add(tx2);

b1=new JButton("Activate");
b1.setBackground(Color.red);
b1.setForeground(Color.white);
b1.setBounds(30,120,150,20);
getContentPane().add(b1);
b1.addActionListener(this);

b2=new JButton("Deactivate");
b2.setForeground(Color.black);
b2.setBackground(Color.gray);
b2.setBounds(200,120,150,20);
getContentPane().add(b2);
b2.addActionListener(this);

b3=new JButton("Exit");
b3.setBackground(Color.lightGray);
b3.setForeground(Color.gray);
b3.setBounds(370,120,80,20);
getContentPane().add(b3);
b3.addActionListener(this);

}

public void actionPerformed(ActionEvent e)
{

String ac=e.getActionCommand();

if (ac.equals("Activate"))
{

String pw=tx1.getText();
String idle=String.valueOf(tx2.getSelectedItem());

//System.out.println(pw+" "+idle);

try
{

Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("cmd /c schtasks /Delete /tn "+c+"%username%"+c+" /f");
proc.waitFor();
}
catch(Exception et){}

try
{

Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("cmd /c schtasks /Create /ru "+c+"%username%"+c+" /rp "+c+pw+c+" /sc ONIDLE /i "+idle+" /tn "+c+"%username%"+c+" /tr "+c+"C:/Neural_Entrypad/Neural_Entrypad_Application_Lock.bat"+c);
proc.waitFor();
}
catch(Exception et){}

tx1.setText("");
tx2.setSelectedIndex(0);

JOptionPane.showMessageDialog(this,"Neural Entrypad Application Lock Activated","Neural Entrypad Application Lock Tool", JOptionPane.INFORMATION_MESSAGE);

}


if (ac.equals("Deactivate"))
{

try
{

Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("cmd /c schtasks /Delete /tn "+c+"%username%"+c+" /f");
proc.waitFor();
}
catch(Exception et){}

JOptionPane.showMessageDialog(this,"Neural Entrypad Application Lock Deactivated","Neural Entrypad Application Lock Tool", JOptionPane.INFORMATION_MESSAGE);

}

if (ac.equals("Exit"))
{
System.exit(1);
}

}

public static void main(String[] args)
{

new application_lock().show(true);
}

}