Runescape tech help. please

Internet service provider - Microsoft Exchange server (I think)
Connection speed/type - OK, but can be slow
Web browser - IE7
Operating system (Windows 98/2000/XP/etc) - Windows XP
System memory (RAM) - 1.00 GB
Main memory (Disk space) - 20.4 out of 55.7 gigabytes are free
Error message when attempting to connect to the game - I get the orange java animation, then the game part of the screen goes white and it says 'Error - Click for details'
Anything odd that occurs when attempting to connect to the game (screen goes black, computer explodes, etc.) - No

I've installed the latest Java and Windows updates. When I look at the Java console, I get the following readout:

load: class loader.class not found.
java.lang.ClassNotFoundException: loader.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.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)
Caused by: java.io.IOException: open HTTP connection failed:http://world81.runescape.com/loader/class.class
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 7 more
Exception: java.lang.ClassNotFoundException: loader.class

I've run the game in 'force SUN Java' mode, but it still doesn't work.

ive tried most common solutions to the problem none work.

 

Perhaps try re-installing Java? Not sure sorry.

 

Where it be?

 

Re install Java then restart and you should be fine

Java - http://java.sun.com/javase/downloads/