Trouble with loading up an image!! HELP!!

import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import java.util.*;
import javax.imageio.ImageIO;
import java.net.*;
import javax.swing.filechooser.*;

public class ImageMaker extends JFrame implements ActionListener
{
	String kBanner = "ImageMaker v1.0";

	JPanel contentPane;
	JButton loadButton;
	JToolBar toolBar;
	JMenuBar menuBar;
	JMenu fileMenu;
	JMenuItem fileOpenMenuItem;

	public BufferedImage mBufferedImage;

	public ImageMaker(String fileName)
	{
		Container appWindow = getContentPane();
		setTitle(kBanner);
		appWindow.setLayout(new BorderLayout(5,5));

		menuBar = new JMenuBar();
		setJMenuBar(menuBar);

		fileMenu = new JMenu("File");
		menuBar.add(fileMenu);

		fileOpenMenuItem = new JMenuItem("Open");
		fileMenu.add(fileOpenMenuItem);
		fileOpenMenuItem.addActionListener(this);

		toolBar = new JToolBar();

		loadButton = new JButton("Open");
		loadButton.addActionListener(this);
		toolBar.add(loadButton);

		contentPane = new JPanel();

		appWindow.add( BorderLayout.NORTH, toolBar);
		appWindow.add( BorderLayout.SOUTH, contentPane);
	}

	public void loadImage(String fileName)
	{
		Image image = Toolkit.getDefaultToolkit().getImage(fileName);
		MediaTracker mt = new MediaTracker(this);
		mt.addImage(image, 0);
		try { mt.waitForID(0); }
		catch (InterruptedException ie) { return; }
		if (mt.isErrorID(0)) return;

		mBufferedImage = new BufferedImage(image.getWidth(null),
										   image.getHeight(null),
                                           BufferedImage.TYPE_INT_RGB);
		Graphics2D g2 = mBufferedImage.createGraphics();
		g2.drawImage(image, null, null);

		validate();
		repaint();
		setTitle(kBanner + ": " + fileName);
	}


	public void paint(Graphics g)
	{
		super.paint(g);
		if (mBufferedImage == null) return;
		Insets insets = getInsets();
		g.drawImage(mBufferedImage, insets.left, insets.top, null);
	}


	public void actionPerformed(ActionEvent ae)
	{
		JFileChooser fd = new JFileChooser();
		int returnVal=fd.showOpenDialog(ImageMaker.this);
		if(returnVal==JFileChooser.APPROVE_OPTION)
			{
				if (fd.getSelectedFile() == null)
	        		{ return; }
				File file=fd.getSelectedFile();
				String path=(String)file.getPath();
				loadImage(path);
			}

		JMenu men = (JMenu) ae.getSource();
		String label = (String) men.getText();

		JButton butt = (JButton) ae.getSource();
		String butt2 = (String) butt.getText();

		if (label.equals("Open"))
		{/*............*/}
    	else if (label.equals("Save"))
    	{/*............*/}

	}//end ActionListener


	public static void main(String[] args)
	{
		String fileName = "default";
		if (args.length > 0) fileName = args[0];
		ImageMaker img=new ImageMaker(fileName);
		img.setSize(800,600);
		img.show();
	}
}