Plug-in ClassNotFoundException Error

Hello!
I've installed the Java Plug-in 1.4 on Windows NT , I'm using Internet Explorer 6.
I've tried to see the demo pages from the java.sun.com site , for example the "A Clock" ,
but I've got an exception:
load: class Clock.class not found.
java.lang.ClassNotFoundException: Clock.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
I've tried this with the 1.3.1 version , the same error.
Please help me.
Thank you .Victor.

Hi
The java runtime environment is not properly installed on your machine please check.
Thanks
Swaraj

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