Babylon.js armature can't move properly

Hello every one, i have an issue about loading a armatured babylon file.
I have a blender file with skeleton, then i export it to babylon. when i load it in babylon my file can move but the move is so strange. it doesn't move like in blender.
 
here is my code

function loadGajah() {
    BABYLON.SceneLoader.ImportMesh("", "assets/", "gajahGerak5.babylon", scene, function (newMeshes, particleSystems, skeletons) {
               newMeshes[0].checkCollisions = true;
               //newMeshes[0].position =  new BABYLON.Vector3(-80, -13, -50);
               newMeshes[0].position =  new BABYLON.Vector3(10, -13, -10);
               newMeshes[0].scaling = new BABYLON.Vector3(0.0055, 0.0055, 0.0055);
               newMeshes[0].diffuseTexture = new BABYLON.Texture("gajah1_2.MainEleH_NORMALS.jpg", scene);
                scene.beginAnimation(skeletons[0], 1, 40, true, 1.0);
              
            });
}

thanks