Java swing on Internet Explorer Urgent

hello,
I have simple applet. Which can be viewed on appletviewer , But if I try to view in Internet Explorer ,it gives nothing.
Plz help Me.

Go to this page to find out what version of Java your browser is using:
http://javatester.org/version.html
If it is not JDK 1.2 or higher, it doesn't support Swing or a whole lot of other really useful features that have been in Java for years. Blame Microsoft for that.
Then go and download the Sun Java plugin so that your browser will be using an up-to-date Java implementation.
Regards,
Dave Gilbert
http://www.jfree.org

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I signed my applet as u said but for some reason the browser is not recognising the cert.The applet is reading a wrl file from my local C drive.I'm creating a plugin to show this applet in the browser window.this is all i have to do.i guess u will have an idea by looking at this program of mine.
Curves.wrl is the file which i'm reading from the Cdrive.
i even changed my policy file but in vain.
JAVA CODE
import java.awt.BorderLayout;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import javax.vecmath.Point3d;
import com.sun.j3d.loaders.Scene;
import java.awt.GraphicsConfiguration;
import java.io.*;
import com.sun.j3d.loaders.vrml97.VrmlLoader;
import com.sun.j3d.loaders.Scene;
import com.sun.j3d.utils.behaviors.mouse.*;
import com.sun.j3d.utils.geometry.ColorCube;
import java.lang.*;
import java.applet.*;
import java.net.URL;
     public class Vrml2 extends Applet {
     private SimpleUniverse u=null;
     public BranchGroup createSceneGraph() {
     BranchGroup objRoot = new BranchGroup();
     //TransformGroup objScale = new TransformGroup();
     //Transform3D t3d = new Transform3D();
     //t3d.setScale(0.3);
     //objScale.setTransform(t3d);
     //objRoot.addChild(objScale);
     BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),      100.0);
     Color3f bgColor = new Color3f(1.0f,1.0f,1.0f);
     Background bg = new Background(bgColor);
     bg.setApplicationBounds(bounds);
     objRoot.addChild(bg);
     Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
     Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
     DirectionalLight light1 = new DirectionalLight(light1Color,      light1Direction);
     light1.setInfluencingBounds(bounds);
     objRoot.addChild(light1);
     TransformGroup objTrans = new TransformGroup();
     objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
     objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
     objTrans.setCapability(ColoringAttributes.ALLOW_COLOR_READ);     objTrans.setCapability(ColoringAttributes.ALLOW_COLOR_WRITE);     objTrans.setCapability(Material.ALLOW_COMPONENT_READ);
     objTrans.setCapability(Material.ALLOW_COMPONENT_WRITE);
     objTrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
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     objRoot.addChild(objTrans);
     VrmlLoader loader = new VrmlLoader();
     Scene s = null;
     try {
          s = loader.load("c:/documents and      settings/dk27/morph/curves.wrl");
     catch (SecurityException e) {
          System.out.println(" caught security exception by deepti");
          System.out.println(e);
     catch (Exception e) {
          System.out.println("Exception caught");
          System.err.println(e);
          System.exit(1);
     //objTrans.addChild(new ColorCube(0.2));
     objTrans.addChild(s.getSceneGroup());
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     Transform3D tr3d=new Transform3D();
     tr3d.lookAt(new Point3d(13.00,-2.5,11.83),new Point3d      (20.0,0.0,50.0),new Vector3d(0.0,1.0,0.0));
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     behavior.setTransformGroup(objTrans);
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     behavior.setSchedulingBounds(bounds);
     //to zoom the cone middle button
     MouseZoom behavior1=new MouseZoom();
     behavior1.setTransformGroup(objTrans);
     objTrans.addChild(behavior1);
     behavior1.setSchedulingBounds(bounds);
     //to translate the cone right button
     MouseTranslate behavior2=new MouseTranslate();
     behavior2.setTransformGroup(objTrans);
     objTrans.addChild(behavior2);
     behavior2.setSchedulingBounds(bounds);
     objRoot.compile();
     return objRoot;
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     public void init(){
     setLayout(new BorderLayout());
     GraphicsConfiguration config=SimpleUniverse.getPreferredConfiguration     ();
     Canvas3D c = new Canvas3D(config);
     add("Center", c);
     BranchGroup scene = createSceneGraph();
     SimpleUniverse u = new SimpleUniverse(c);
     u.getViewingPlatform().setNominalViewingTransform();
     u.addBranchGraph(scene);
     public void destroy(){
     u.removeAllLocales();
     public static void main(String[] args) {
     new MainFrame(new Vrml2(),600,800);
APPLET CODE:
<HTML>
<HEAD>
<TITLE>Morphing Applet</TITLE>
</HEAD>
<BODY>
<APPLET CODE = "Vrml2" CODEBASE = "." ARCHIVE = "Vrml2.jar" WIDTH = 202 HEIGHT = 177>
</APPLET>
</BODY>
</HTML>
the errors that it is displaying are
java.security.cert.CertificateException: Unable to verify the certificate with root CA
     at sun.plugin.security.TrustDecider.isAllPermissionGranted(Unknown Source)
     at sun.plugin.security.PluginClassLoader.getPermissions(Unknown Source)
     at java.security.SecureClassLoader.getProtectionDomain(SecureClassLoader.java:162)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:128)
     at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
     at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:108)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
     at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:373)
     at sun.applet.AppletPanel.createApplet(AppletPanel.java:579)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(AppletPanel.java:515)
     at sun.applet.AppletPanel.run(AppletPanel.java:293)
     at java.lang.Thread.run(Thread.java:484)
java.lang.ExceptionInInitializerError: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
     at java.security.AccessControlContext.checkPermission(AccessControlContext.java:272)
     at java.security.AccessController.checkPermission(AccessController.java:399)
     at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
     at sun.applet.AppletSecurity.checkAccess(AppletSecurity.java:139)
     at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:279)
     at java.lang.ThreadGroup.getParent(ThreadGroup.java:140)
     at javax.media.j3d.MasterControl$23.run(MasterControl.java:3077)
     at java.security.AccessController.doPrivileged(Native Method)
     at javax.media.j3d.MasterControl.<clinit>(MasterControl.java:3070)
     at javax.media.j3d.VirtualUniverse.<clinit>(VirtualUniverse.java:206)
     at Vrml4.init(Vrml4.java:110)
     at sun.applet.AppletPanel.run(AppletPanel.java:344)
     at java.lang.Thread.run(Thread.java:484)
Exception:java.io.FileNotFoundException: D:\JDK13~1.1\lib\flavormap.properties (The system cannot find the file specified) while loading default flavormap.properties file URL:file:D:\JDK13~1.1\lib\flavormap.properties

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Hi ,
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