Application failed to run.

That pretty much sums up my problem here. Got a nice shiny copy of XP on here, installed open office on it to get me java, then remembered this game :D

Tried with and without opengl, and long story short, it warned me that bits of this are signed and bits aren't. I said that's cool, just run the damn game, and it just blanks the login, says there's an error, and I should click for details. It spits out this:

java.lang.ClassFormatError: Incompatible magic value 540811588 in class file org/jdesktop/applet/util/JNLPAppletLauncher
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassFormatError: Incompatible magic value 540811588 in class file org/jdesktop/applet/util/JNLPAppletLauncher

I'm gonna try this on my Win7 partition next, and then on my Win7 laptop just for giggles. But it'd be nice if I could keep this up on my work partition... Cos I'm totally working hey? >...>

Browsers used were Firefox 3.6 and Chrome 6

Hope to see the people who can actually remember me back in game sometime. Ciao

Edit: Fix my spelling
Edit^2: Win7 partition does the same thing. Trying my laptop last, which seems to get a little further. Shows me a loading screen then just sits there having a party without me.