Problem| login register script

i using this system: [url]http://forum.unity3d.com/threads/150536-Easy-login-register-script[/url]

but i getting this error:

 SecurityException: No valid crossdomain policy available to allow access
 UnityEngine.WWW.get_text () (at C:/BuildAgent/work/812c4f5049264fad/Runtime/ExportGenerated/Editor/Utils.cs:93)
 NewBehaviourScript+$write$52+$.MoveNext () (at Assets/Scripts/NewBehaviourScript.js:55)

what's the problem?