Ajax Get Url is not Responding

I'm trying to get some XML file from the net and i need to display that in my html page...... This is how my javascript file looks like:

$(document).ready(function(){
      $(".update").append("<ul></ul>");
           $.ajax({
           type: "GET",
           url: "http://ift.tt/1F7OaY1",
           dataType: "xml",
           success: function(xml){
                    $(xml).find('slide').each(function(){
                      var sTitle = $(this).find('title').text();
                      //var sPublisher = $(this).find('heading').text();
                      $("<li></li>").html(sTitle + ", " + "sPublisher").appendTo(".update ul");
                    });
                  },
           error: function() {
                    alert("An error occurred while processing XML file.");
                  }
          });
 });

When i try to run this using this URL the browser gives an error saying "An error occurred while processing XML file"........................ But if i download the XML File and write it as following.... It will run the page without any errors.......

$.ajax({
     type: "GET",
     url: "data.xml",
     dataType: "xml",
...................................

I also tried to use another online XML File same thing happened...... Anyone has an idea how to solve this??? Thank You!!!!!