Trouble with VM?

[Brian Gonzales <gonzales@thuntek.net>]

Installed a copy of j2se-common, j2sdk1.4 & j2re1.4 that I downloaded
from: http://jrfonseca.dyndns.org/debian/. It installed with no
problems. I wrote a simple HelloWorld.java that works, but when I access
the JVM test page at: http://www.java.com/en/download/help/testvm.jsp, I
get the infamous 'Red X'.

I've tried accessing this page with Galeon, Mozilla, Mozilla-Firebird,
Konquerer and Netscape's browser but none works (I enabled Java on all
browsers).

Thank you very much in advance.

Here's the text from my Java Console:
java.lang.ClassFormatError: testvm/class (Bad magic number)
	at java.lang.ClassLoader.defineClass0(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
	at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
	at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:148)
	at
sun.plugin.security.PluginClassLoader.findClass(PluginClassLoader.java:168)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
	at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:114)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
	at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:506)
	at sun.applet.AppletPanel.createApplet(AppletPanel.java:566)
	at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1775)
	at sun.applet.AppletPanel.runLoader(AppletPanel.java:495)
	at sun.applet.AppletPanel.run(AppletPanel.java:292)
	at java.lang.Thread.run(Thread.java:536)