It is very important that CORS is activated, it works now!to C:\inetpub\wwwroot\ArcGIS\rest\Web.ConfigI inserted<httpProtocol><customHeaders><add name="Access-Control-Allow-Origin" value="*" /></customHeaders></httpProtocol>Then it`s important that the browser supports CORS (http://enable-cors.org/) 🙂I had no Luck with Firefox 24, but it worked with Chrome 30, everything fine now