unsatisfiedLinkErro _nVideoCapture in example Native

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Hello All,

I have made a application by use example given on Android development with OpenCV page in Native/C++ but gives error given below.

01-25 16:53:13.588: E/AndroidRuntime(9979): java.lang.UnsatisfiedLinkError: n_VideoCapture
01-25 16:53:13.588: E/AndroidRuntime(9979):     at org.opencv.highgui.VideoCapture.n_VideoCapture(Native Method)
01-25 16:53:13.588: E/AndroidRuntime(9979):     at org.opencv.highgui.VideoCapture.<init>(VideoCapture.java:113)
01-25 16:53:13.588: E/AndroidRuntime(9979):     at com.example.helloworld.HelloOpenCVView.cameraOpen(HelloOpenCVView.java:93)
01-25 16:53:13.588: E/AndroidRuntime(9979):     at com.example.helloworld.MainActivity.onResume(MainActivity.java:70)