Java 7 Update 5 ( Build 1.7.0_B05)
Windows Vista Business

After Java 7 Update ,Java don't start -Error in Windows Vista!

When Verifying in Java website , It shows Error :
Application Error:
ClassNotFoundException
testJava2_1.TestVMApplet.class

Detail:
plugin2manager.parentwindowDispose
java.lang.ThreadDeath
at java.lang.Thread.stop(Unknown Source)
at java.lang.ThreadGroup.stopOrSuspend(Unknown Source)
at java.lang.ThreadGroup.stop(Unknown Source)
at sun.awt.AppContext.dispose(Unknown Source)
at com.sun.deploy.uitoolkit.impl.awt.AWTAppContext$Ap pContextDisposer.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
PluginMain: could not create embedded frame


Java Plug-in 10.5.1.255
Using JRE version 1.7.0_05-b05 Java HotSpot(TM) Client VM
User home directory = C:\Users\Office
----------------------------------------------------
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>


Please help check what's wrong with this?
How to solve this problem ,let Java running normal in my windows vista!!!