Java class not found.

Java Plug-in 1.6.0_15
Using JRE version 1.6.0_15-b03 Java HotSpot(TM) Server VM
User home directory = /home/XXXXX
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

load: class net.Slingshot.Viewer.Viewer.class not found.
java.lang.ClassNotFoundException: net.Slingshot.Viewer.Viewer.class
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:152)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
 at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:445)
 at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:2880)
 at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1397)
 at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: open HTTP connection failed:https://www.cimbinvest.com/app/applets/net/Slingshot/Viewer/Viewer/class.class
 at sun.plugin2.applet.Applet2ClassLoader.getBytes(Applet2ClassLoader.java:460)
 at sun.plugin2.applet.Applet2ClassLoader.access$000(Applet2ClassLoader.java:46)
 at sun.plugin2.applet.Applet2ClassLoader$1.run(Applet2ClassLoader.java:126)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:123)
 ... 6 more
Exception: java.lang.ClassNotFoundException: net.Slingshot.Viewer.Viewer.class