10g DISCOVERER Plus is not opening

Hi ALL,
I trying to open the discoverer plus but I am getting the error like this
'error for click deatils'
EBS version 12.0.6
DB version 10.2.0.4
Discoverer version 10.1.2.55.26
Thanks in Advance
Kumar

Hi Hussein
I am getting the below java error. please help us.
Java Plug-in 1.6.0_24
Using JRE version 1.6.0_24-b07 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\kd08754
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>
proxyHost=null
proxyPort=0
connectMode=HTTPS, native.
Forms Applet version is : 10.1.2.3
load: class oracle.disco.DiscoApplet not found.
java.lang.ClassNotFoundException: oracle.disco.DiscoApplet
     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$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassNotFoundException: oracle.disco.DiscoApplet
load: class oracle.disco.DiscoApplet not found.
java.lang.ClassNotFoundException: oracle.disco.DiscoApplet
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassNotFoundException: oracle.disco.DiscoApplet
Thanks & Regards
Kumar

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i have moved this thread to this forum from discoverer.
Dear,
ebs 12.0.6
OS OUL5x64
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Pl see
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Hi,
The user is using Windows machine and trying to login to Discoverer Plus 10g. He recently upgraded to Java 1.8 and was not able to login.
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Cause
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Please help on the ff question posed to me from our client who just had Discoverer Plus 10g implemented at their sites.
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