android ndk sample using prebuilt libraries

[aashishvijayvi]

new to android.
working on android jni(ndk).done some sample projects based on prebuilt library, having same problems
my androi.mk is

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE :=hello-jni
LOCAL_SRC_FILE:=hello-jni.c
LOCAL_SHARED_LIBRARY := ndk
include $(BUILD_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := ndk
NDK_MODULE_PATH := $(LOCAL_PATH)
LOCAL_SRC_FILES := libndk.so
include $(PREBUILT_SHARED_LIBRARY)

hello-jni.c calls functions from libndk.so(ARM lib.)

this project run successfully several times but when i restarted the eclipse and again run the project from eclipse.
emulator load the project. but having the problem calling funtions from shared library. it stopped unexpectedly. when i debug in logcat view it show unsatisfied linker error.
please help me out this problem.
attached the project also

my email address is ashish_vijayvirgiya@yahoo.com
if you want some additional information then you tell me.

thanks.