cannot load image

I cannot get my program to load an image and display it. I have read
several forums and help sites and have used all the code regarding
mediatracker, but for some reason, it simply will not load my images.
I have also tried multiple combinations of how I insert the file
name. Below is the code I got from a website that seems like it
should work, but it won't. I have Windows Vista on my computer...is
it possible that is part of the problem? Below is the code I cannot
get to work that I got from a website. Any help you could give me
would be appreciated.

import java.awt.*;
import java.awt.event.*;

public class Viewer extends Frame {
    private Image image;

    public Viewer(String fileName) {
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        image = toolkit.getImage(fileName);
        MediaTracker mediaTracker = new MediaTracker(this);
        mediaTracker.addImage(image, 0);
        try {
            mediaTracker.waitForAll();
        } catch (InterruptedException ie) {
            System.err.println(ie);
            System.exit(1);
        }
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        setSize(image.getWidth(null), image.getHeight(null));
        setTitle(fileName);
        setVisible(true);
    }

    public void paint(Graphics graphics) {
        graphics.drawImage(image, 0, 0, this);

    }

    public static void main(String[] args) {
        new Viewer(args[0]);
    }

}