Java SE (Java Platform, Standard Edition)

Hi everbody,,,

im using Eclipse Applet Viewer and it was running yesterday but today it is not???

here is one exmaple:

import java.applet.Applet;
import java.awt.*;
import java.net.*;


public class ImageExample extends Applet {
MediaTracker mt;
Image img;
URL base;

public void init(){
	mt = new MediaTracker(this);
	try{
		base = getDocumentBase();
	}
	catch(Exception e){}
	
	img = getImage(base,"1.gif");
	
	mt.addImage(img,1);
	
	try{
		mt.waitForAll();
	}
	catch(InterruptedException e){}
	
	
}
public void paint(Graphics g){
	g.drawImage(img, 20, 20, this);
	
}

}

it not working with any examples? and i dont why?

here is the error
====================================================================
load: class ImageExample.class not found.
java.lang.ClassNotFoundException: ImageExample.class
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:183)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:127)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:626)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:779)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:708)
at sun.applet.AppletPanel.run(AppletPanel.java:362)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.FileNotFoundException: /usr2/httpd/jspapps/tomcat/ImageExample/class.class (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.io.FileInputStream.<init>(FileInputStream.java:66)
at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:70)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:161)
at sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:295)
at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:44)
at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:173)
at java.security.AccessController.doPrivileged(Native Method)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:170)
... 8 more
====================================================================
im using this tutroial to run the Applet

http://www.cs.utah.edu/classes/cs1021/notes/lecture03/eclipse_help.html

Please Advice Me

thanx in advance