title: java.lang.UnsatisfiedLinkError: Couldn't load andenginephysicsbox2dextension from loader dalvik.system.PathClassLoader... findLibrary returned null
body: <p>this error when running my project : </p>
  
  <pre><code>05-28 07:52:04.314: E/AndroidRuntime(1391): FATAL EXCEPTION: UpdateThread
  05-28 07:52:04.314: E/AndroidRuntime(1391): Process: com.brekol, PID: 1391
  05-28 07:52:04.314: E/AndroidRuntime(1391): java.lang.UnsatisfiedLinkError: Couldn't load andenginephysicsbox2dextension from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.brekol-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.brekol-1, /system/lib]]]: findLibrary returned null
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at java.lang.Runtime.loadLibrary(Runtime.java:358)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at java.lang.System.loadLibrary(System.java:526)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.extension.physics.box2d.PhysicsWorld.&lt;clinit&gt;(PhysicsWorld.java:35)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.GameScene.createPhysics(GameScene.java:119)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.GameScene.createScene(GameScene.java:74)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.BaseScene.&lt;init&gt;(BaseScene.java:30)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.GameScene.&lt;init&gt;(GameScene.java:44)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.manager.SceneManager$1.onTimePassed(SceneManager.java:75)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.handler.timer.TimerHandler.onUpdate(TimerHandler.java:94)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.handler.UpdateHandlerList.onUpdate(UpdateHandlerList.java:47)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine.onUpdateUpdateHandlers(Engine.java:618)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine.onUpdate(Engine.java:605)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.LimitedFPSEngine.onUpdate(LimitedFPSEngine.java:57)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine.onTickUpdate(Engine.java:568)
  05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine$UpdateThread.run(Engine.java:858)
  </code></pre>
  
  <p>PLEASE HELP ME!!! WHY THIS ERROR?? </p>