Can Not Access WWW.bytes in Webplayer

After update Unity3d Plugin update, WWW.bytes seem always get null in Webplayer, however it is fine in Editor. But the object can be initialized

Here is the code

Code (csharp):

1.  
2.     protected IEnumerator Load()
3.     {
4.         request =new WWW(url);
5.         yield return request;
6.        
7.         Instantiate(request.assetBundle.mainAsset);
8.        
9.         size = request.bytes.Length;
10.     }
11.  
12.  

size always gets zero in webplayer, but it get the actual data in Editor.

Here is the Asset Bundle Create Code

Code (csharp):

1.  
2.     BuildPipeline.BuildAssetBundle(goObject,null,"test.unity3d",BuildAssetBundleOptions.CollectDependencies,BuildTarget.WebPlayer);
3.  

Thanks in advance

 

Anyone can help?