[JAVA3D] .jar cannot include .wrl ?

[cs]

I write an applet which includes some audio files, VRML file and some image files:
audio(folder,including .wav)
img(folder,including .gif,.jpg for the buttons in my applet)
test.wrl
MyApplet1.class,MyApplet2.class,......(myApplet1 is the main class)

at the current path I use jar tools to compress the above files:
jar cvf MyApplet.jar *.*

and I write a test.html:
<applet
code     = "MyApplet1.class"
archive  = "MyApplet.jar"
name     = "TestApplet"
width    = "640"
height   = "480"
>
</applet>

so the current path is :
MyApplet.jar
test.html

I open the test.html in IE then the applet console tell me as following:
IOException reading data: java.io.FileNotFoundException: F:\myapplet\test.wrl (can not 
find the file.)
java.io.FileNotFoundException: F:\myapplet\test.wrl (can not find the file.)

And I cannot load the image files too.But I am confused that when I move the VRML file 
and the image files out of the .jar ,just like as following:
MyApplet.jar
img(folder,including .gif,.jpg for the buttons in my applet)
test.wrl
test.html

so the applet can run!--the audio files can be included in the .jar!

I am appreciated to get the reply from anybody.

some codes as following:
***************************************************************************
load audio:
..
AudioClip crowdcheer = getAudioClip(codeBase, "audio/audio1.wav");
..
***************************************************************************
load VRML:
..
String file = "/test.wrl";

        codeBase = getCodeBase();
        URL filePath = null;
        try {
            filePath = new URL(codeBase.toString() + file);
        } catch (MalformedURLException malformedurlexception1) {
            System.err.println(malformedurlexception1);
            System.exit(1);
        }
BranchGroup sceneGroup = loadVRML(filePath);
..
BranchGroup loadVRML(URL filename) {
        VrmlLoader l = new VrmlLoader();
        try {
            scene = l.load(filename);
        } catch (FileNotFoundException e) {
            System.err.print(e);
            System.exit(1);
        } catch (ParsingErrorException e) {
            System.err.print(e);
            System.exit(1);
        } catch (IncorrectFormatException e) {
            System.err.print(e);
            System.exit(1);
        }
        BranchGroup bg = scene.getSceneGroup();
        return bg;
    }
***************************************************************************
load image:
..
 try{
        URL url1 = ddd.codeBase;
        iconpath1 = new URL(url1.toString() + "/images/ButtonHome.gif");
        iconpath2 = new URL(url1.toString() + "/images/top10.gif");
    }
    catch(MalformedURLException malformedurlexception){
        System.err.println(malformedurlexception);
        System.exit(1);
    }
    icon1=new ImageIcon(iconpath1);
    icon2=new ImageIcon(iconpath2);
..
　　　　　　　　
                                

　　　　　　　　cs　　　　　　　　
　　　　　　　　　　2004-08-06

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