WWW class exception

On the platform of Android, the WWW class access domain throws an exception.

E/AndroidRuntime(11176): FATAL EXCEPTION: Thread-5964

E/AndroidRuntime(11176): java.lang.NullPointerException

E/AndroidRuntime(11176): at libcore.net.http.HttpConnection$Address.hashCode(HttpConnection.java:343)

E/AndroidRuntime(11176): at java.util.HashMap.get(HashMap.java:298)

E/AndroidRuntime(11176): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:67)

E/AndroidRuntime(11176): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)

E/AndroidRuntime(11176): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)

E/AndroidRuntime(11176): at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)

E/AndroidRuntime(11176): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)

E/AndroidRuntime(11176): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)

E/AndroidRuntime(11176): at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)

E/AndroidRuntime(11176): at libcore.net.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:479)

E/AndroidRuntime(11176): at com.unity3d.player.WWW.run(Unknown Source)

On the platform of Android.
The following URL will be wrong.

CDN Url : http://zzb_dl.aigame365.com/android_1_2_4/RGBA32/resEdition.unity3D
Domain name Url : http://zzb_dl_bak.aigame365.com/android_1_2_4/RGBA32/resEdition.unity3D

IEnumerator Start()
{
WWW www = new WWW(“http://zzb_dl.aigame365.com/android_1_2_4/RGBA32/resEdition.unity3D”);
yield return www;
}