Problem in inbuilt Webcam using JMF

Hi,

I am using JavaTM Media Framework 2.1.1e downloaded from below link in my application.
Java Archive Downloads -Java Client Technologies .

Main functionality of my app is to use Web-camera.

My application is working fine on Windows XP and Windows 7 using external Web-Cam device.
However, the same application is giving problem in accessing in-built Webcam on Windows 7.

I tried to access in-built Web-Camera from JMStudio app(of JMF..File->Capture->check 'Use video device'-> Press 'Ok'), however JMStudio itself is not able to access in-built web-camera. Always I am getting the error 'Couldn't initialize the Capture Device!'.

Please note that JMF Registry Editor(JMStudio->Preferences->Capture Device->Detect Capture Devices')is able to detect the inbuilt web-cam device.

Is this the issue in JMF itself or I can resolve the issue from my application also?

Also, when I tried to do online JMF diagnostics, I am getting below error.
Online JMFDiagnostics URL: JMF - Diagnostics Applet

Java Plug-in 1.6.0_26
Using JRE version 1.6.0_26-b03 Java HotSpot(TM) Client VM
User home directory = C:\Users\taipakai
----------------------------------------------------
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>
----------------------------------------------------
java.lang.ClassFormatError: Incompatible magic value 1008813135 in class file JMFDiagnostics
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(Unknow n Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(U nknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassFormatError: Incompatible magic value 1008813135 in class file JMFDiagnostics

Please suggest.

Thanks for your help in advance.