Java plugin doesn't work on firefox 3.5.6 linux

Hi, i don't know what happenned since until yesterday everything worked alright, but now instead of a java applet in the correct place on a web page i get an error. This is what says:
Java Plug-in 1.6.0_16
Usar versión JRE 1.6.0_16-b01 Java HotSpot(TM) Client VM
Directorio local del usuario = /home/freehost
c: borrar ventana de consola
f: finalizar objetos en la cola de finalización
g: liberación de recursos
h: presentar este mensaje de ayuda
l: volcar lista del cargador de clases
m: imprimir sintaxis de memoria
o: activar registro
q: ocultar consola
r: recargar configuración de norma
s: volcar propiedades del sistema y de despliegue
t: volcar lista de subprocesos
v: volcar pila de subprocesos
x: borrar antememoria del cargador de clases
0-5: establecer nivel de rastreo en <n>
cargar: clase JAVACharter/Charter.class no encontrada.
java.lang.ClassNotFoundException: JAVACharter.Charter.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.net.ConnectException: Network is unreachable
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
 at java.net.Socket.connect(Socket.java:525)
 at sun.net.NetworkClient.doConnect(NetworkClient.java:161)
 at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
 at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
 at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
 at sun.net.www.http.HttpClient.New(HttpClient.java:306)
 at sun.net.www.http.HttpClient.New(HttpClient.java:323)
 at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:860)
 at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:801)
 at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:726)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1049)
 at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:373)
 at sun.plugin2.applet.Applet2ClassLoader.getBytes(Applet2ClassLoader.java:458)
 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
Excepción: java.lang.ClassNotFoundException: JAVACharter.Charter.class
I'm on debian squeeze. Thanks in advance

i have met the issue, and want to know to know how to solve it?

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