3D model is not showing in Android

I'm using AssetBundle for download the 3D model from server and displaying in the screen. When i using the unity playmode then the 3D model is showing but when i run the project in android mobile device it's not working and the cube is not showing.

  mBundleInstance = Instantiate (bundle.mainAsset) as GameObject;
     mBundleInstance.transform.parent = imageTarget.transform;
     mBundleInstance.transform.localScale = new Vector3(0.3f, 0.3f, 0.3f);
     mBundleInstance.transform.localPosition = new Vector3(0.0f, 0.15f, 0.0f);
     mBundleInstance.transform.gameObject.SetActive(true);