my opencv projects does't work

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h hello , i am trying to use opencv version 2.4.6 on my eclipse juno .. and i am trying to build color blob detection project on android .. but it keep give me error on some imports lines like : import org.opencv.android.BaseLoaderCallback; import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame; import org.opencv.android.LoaderCallbackInterface; import org.opencv.android.OpenCVLoader; and i have imported opencv library and few of errors has gone .. but still i can't take errors from those lines .. is NDK could be the problem?? also i can't see (C/C++ build) option on the properties window on the project?? what the reason?? please help me :(( i am stuck here