I have already run the following code example in processing IDE . here it works fine........... but when i export the applet and open the index.html in moziella fire fox or any other web browser like IE  the applet become a WHITE area  only. in java console  it shows following exception

Java Plug-in 1.6.0_23
Using JRE version 1.6.0_23-b05 Java HotSpot(TM) Client VM

----------------------------------------------------
c:   clear console window
f:   finalize objects on finalization queue
g:   garbage collect
h:   display this help message
l:   dump classloader list
m:   print memory usage
o:   trigger logging
q:   hide console
r:   reload policy configuration
s:   dump system and deployment properties
t:   dump thread list
v:   dump thread stack
x:   clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

Available serial ports:
java.lang.ExceptionInInitializerError thrown while loading gnu.io.RXTXCommDriver
Exception in thread "Animation Thread" java.lang.ExceptionInInitializerError
    at processing.serial.Serial.list(Unknown Source)
    at sketch_aug04a.setup(sketch_aug04a.java:34)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission loadLibrary.rxtxSerial)
    at java.security.AccessControlContext.checkPermission(Unknown Source)
    at java.security.AccessController.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkLink(Unknown Source)
    at java.lang.Runtime.loadLibrary0(Unknown Source)
    at java.lang.System.loadLibrary(Unknown Source)
    at gnu.io.CommPortIdentifier.<clinit>(CommPortIdentifier.java:123)
    ... 5 more


my processing code is....

// Processing code for this example
 // Dimmer - sends bytes over a serial port
 // by David A. Mellis
 //This example code is in the public domain.
 
 import processing.serial.*;
 Serial port;
 
 void setup() {
 size(256, 150);
 
 println("Available serial ports:");
 println(Serial.list());
 
 // Uses the first port in this list (number 0).  Change this to
 // select the port corresponding to your Arduino board.  The last
 // parameter (e.g. 9600) is the speed of the communication.  It
 // has to correspond to the value passed to Serial.begin() in your
 // Arduino sketch.
 port = new Serial(this, "COM22", 9600); 
 
 // If you know the name of the port used by the Arduino board, you
 // can specify it directly like this.
 //port = new Serial(this, "COM1", 9600);
 }
 
 void draw() {
 // draw a gradient from black to white
 for (int i = 0; i < 256; i++) {
 stroke(i);
 line(i, 0, i, 150);
 }
 
 // write the current X-position of the mouse to the serial port as
 // a single byte
 port.write(mouseX);
 }


plz help me to run the applet.....
thanx...