help me urgent(about image movement on keyboard event)

I want to develope standalone application by using java AWT in which an
image would move when down key pressed.
the code is as follows.
................................................
import java.awt.*;
import java.awt.event.*;
import java.awt.Graphics;
class event extends Frame implements KeyListener
{

    Toolkit tk;
    public Image ig;
    Graphics g,g1;

    event()
    {
        setLayout(null);
        setSize(300,300);
    // b=new Button();
    //b.setBounds(20,20,30,30);
    //add(b);

    tk =Toolkit.getDefaultToolkit();
    ig=tk.getImage("C:/pro/New Folder/Mukesh/sky.jpg");
    ig.addKeyListener(this);
    //addKeyListener(this);

    setVisible(true);
    }

public void keyPressed(KeyEvent ke) {

    if(ke.getKeyCode()==KeyEvent.VK_DOWN)
    {
    paint(g1);
    }
    }

    public void keyReleased(KeyEvent ke)
        {

    }

    public void keyTyped(KeyEvent ke) {

        }

public void paint(Graphics g)
{
g.drawImage(ig,100,100,40,40,this);

}

    public static void main(String[] args)
    {
        event as=new event();
    }
}
................................................
Afther compilation following error genrated :----

             C:\pro\New Folder\Mukesh>javac event.java
            event.java:22: cannot find symbol
            symbol : method addKeyListener(event)
            location: class java.awt.Image
            ig.addKeyListener(this);
              ^
            1 error

So, plz help me.