Empty Result Using WebClient

hello,

 i'm trying download rss feed using webclient using simple function (i'm using silverlight 2 beta 2):

        private void cmdretrieve_click(object sender, routedeventargs e) {          
            string url = txtfeed.text;
            webclient client = new webclient();
            client.downloadstringcompleted += new downloadstringcompletedeventhandler(
                    webclient_downloadstringcompleted);
          
            client.downloadstringasync(new uri(txtfeed.text));
        }

        private void webclient_downloadstringcompleted(object sender, downloadstringcompletedeventargs e) {
            if (e.error == null) readfeed(e.result);
            //else resultblock.text = e.error.message;
        }

 

however, of time empty result though i'm sure uri correct, example above example work first rss feed , return empty result other 2 no apparent reason.

//txtfeed.text = @"http://rss.cnn.com/rss/cnn_showbiz.rss";
//txtfeed.text = @"http://rss.news.yahoo.com/imgrss/441";
txtfeed.text = @"http://feeds.gettyimages.com/channels/recenteditorialentertainment.rss"

 

thanks in advance
yehia a.salam

does these websites allow crossdomain?

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