Chat room applet crash with java exception

Hi,

everytime I try to open the chat room applet I receive the following java plugin exception in java console:

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Laden: Klasse ChatApplet.class nicht gefunden
java.lang.ClassNotFoundException: ChatApplet.class
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:152)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
 at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:445)
 at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:2880)
 at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1397)
 at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: open HTTP connection failed:http://community.linuxmint.com/index.php/ChatApplet/class.class
 at sun.plugin2.applet.Applet2ClassLoader.getBytes(Applet2ClassLoader.java:460)
 at sun.plugin2.applet.Applet2ClassLoader.access$000(Applet2ClassLoader.java:46)
 at sun.plugin2.applet.Applet2ClassLoader$1.run(Applet2ClassLoader.java:126)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:123)
 ... 6 more
Ausnahme: java.lang.ClassNotFoundException: ChatApplet.class
Laden: Klasse ChatApplet.class nicht gefunden
java.lang.ClassNotFoundException: ChatApplet.class
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:152)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
 at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:445)
 at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:2880)
 at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1397)
 at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: open HTTP connection failed:http://community.linuxmint.com/index.php/ChatApplet/class.class
 at sun.plugin2.applet.Applet2ClassLoader.getBytes(Applet2ClassLoader.java:460)
 at sun.plugin2.applet.Applet2ClassLoader.access$000(Applet2ClassLoader.java:46)
 at sun.plugin2.applet.Applet2ClassLoader$1.run(Applet2ClassLoader.java:126)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:123)
 ... 6 more
Ausnahme: java.lang.ClassNotFoundException: ChatApplet.class
Laden: Klasse ChatApplet.class nicht gefunden
java.lang.ClassNotFoundException: ChatApplet.class
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:152)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
 at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:445)
 at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:2880)
 at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1397)
 at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: open HTTP connection failed:http://community.linuxmint.com/index.php/ChatApplet/class.class
 at sun.plugin2.applet.Applet2ClassLoader.getBytes(Applet2ClassLoader.java:460)
 at sun.plugin2.applet.Applet2ClassLoader.access$000(Applet2ClassLoader.java:46)
 at sun.plugin2.applet.Applet2ClassLoader$1.run(Applet2ClassLoader.java:126)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:123)
 ... 6 more
Ausnahme: java.lang.ClassNotFoundException: ChatApplet.class
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Details of my system:
OS: Linux Mint 8 - Helena
Browser: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.8) Gecko/20100214 Linux Mint/8 (Helena) Firefox/3.5.8
Java: JRE-Version 1.6.0_15-b03 Java HotSpot(TM) Client VM

Thanks,
Karanosov