2nd Class not displaying in applet on browser

I have a very basic applet that consists of two classes, the applet itself and a gui component class that I created that is used in the applet. When I run it in the AppletViewer, I can see my gui component on the applet just fine. But when I try to run it in the browser, I can only see the applet but not the my gui component class. Both class files are in the same folder as the HTML page. I tried putting both classes in a jar file and using the archive attribute in the applet tag of the HTML file but that didn't help. I even tried putting the entire gui component class inside the applet class. It worked fine in the AppletViewer but not in the Netscape browser.
I'm probably missing something really simple here but I can't figure out what it is. Anybody have any ideas?

Okay, I've whittled the code down to the bare minimum. I have an applet with a single ProgressBar class on it. The applet is in the AIControl.class file and the ProgressBar is in the ProgressBar.class file, both in the same directory. When I run it in the AppletViewer, I see a half full blue progress bar at the bottom of the applet. When I run it in the browser, I only see the blank applet with no progress bar. I'm sure I'm missing something really stupid but I don't see it. Thanks all for your help.
/************** AIControl.java ***************/
import java.awt.*;
import java.applet.*;
import java.util.*;
public class AIControlPanel extends Applet
ProgressBar prgProgressBar = new ProgressBar();
public void init()
     setLayout(null);
     setBackground(java.awt.Color.lightGray);
     setSize(517,431);
     add(prgProgressBar);
     prgProgressBar.setBounds(12,398,492,16);
/************* ProgressBar.java *************/
import java.awt.*;
public class ProgressBar extends java.awt.Canvas
private int percentDone = 50;
public void paint(Graphics g)
double myWidth = getSize().getWidth() - 1;
double myHeight = getSize().getHeight() - 1;
g.setColor(Color.black);
g.drawRect(0, 0, (int)myWidth, (int)myHeight);
g.setColor(Color.blue);
g.fillRect(0, 0, (int)(myWidth*((double)(percentDone)/100)), (int)myHeight);
The HTML file I'm using to run this applet in the browser is bare bones and is as follows:
<HTML>
<HEAD>
<TITLE>Autogenerated HTML</TITLE>
</HEAD>
<BODY>
<APPLET CODE="AIControlPanel.class" WIDTH=517 HEIGHT=431></APPLET>
</BODY>
</HTML>
I don't think I can get much more bare bones than that...and it still doesn't work. Can anyone see what I'm missing?

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