Why JMF can not detect web cam in my net beans IDE?

Hi All,
I am newbie to JMF.
Install JMF in my window 7 system.
JMF can not detact webcam in netbeans IDE 6.8.
But JMStudio is detact available my camera.
CaptureDeviceManager.getDeviceList(null) is return null value.
how to over come this issue...

You probably didn't add JMF.jar to your project library folder.

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