problem : AssetBundles in Unity5

HI....

I'm trying to use the new AssetBundle in Unity5 , but I've a problem

• I imported a cat model to the scene , then attached to it ( Material , Texture , Sound and animation )

• then make it as a prefab

• select the prefab from project Tab , then create AssetBundle , name it as "cat"

• then build it by using this script

     static void BuildAllAssetBundles ()
       {
           BuildPipeline.BuildAssetBundles ("Assets/AssetBundles/CreatedBundles");
       }
  
  

every thing so far is good .

then I tried to load the assetbundle by using this code

 IEnumerator DownloadAndCache (string url)
 {
     using (WWW www = new WWW(url)) 
     {
         yield return www;
         if ( www.text == "" )
             print ("Error");
         else
         {
             AssetBundle loadedAssetBundle = www.assetBundle;
             GameObject gameObject = loadedAssetBundle.LoadAsset("MODEL")as GameObject;
             gameObject.transform.parent     = transform;    
             loadedAssetBundle.Unload(false);
         }
     }
 }

now the problem is :

• the object load and show in the inspector but disabled.

• if I press on it will show on the preview window , but in the scene , disable and I can't remove it either.

the attached image show how it appear on the scene

![alt text][1]

![alt text][2]

what should I do ?

thank you ...