How can I resolve Access-Control-Allow-Origin is not allowed by Access-Control-Allow-Headers, error

Question

$scope.addTodo = function() {     
    var url = 'http://services.postcodeanywhere.co.uk/PostcodeAnywhere/Interactive/Find/v1.10/json2.ws?Key=XE97-xXxx-YG99-JK92&SearchTerm=12345&PreferredLanguage=English&Filter=&UserName=&CallbackFunction=a';
    var config1 = {headers:{
    'Access-Control-Allow-Origin':'*',
    'Access-Control-Allow-Methods': ['OPTIONS', 'GET', 'POST'],
    'Access-Control-Allow-Headers':'Origin, X-Requested-With, Content-Type, Accept',
    'Content-Type':'text/plain; charset=utf-8',
    'Accept':'*/*'
            }};
   //  alert("hello");
   alert("url" + url);
   //Enable cross domain calls
   $http.defaults.useXDomain = true;
   // alert("$http.defaults.useXDomain");
   //Remove the header used to identify ajax call  that would prevent CORS from working
   delete $http.defaults.headers.common['X-Requested-With'];
    //   alert("$http.defaults.headers.common");
    //  alert("$http.config1"+config1);
    //  alert("url" + url);

    $http.get(url, config1).success(function (data, status, headers, config) {
  alert("success");
  if(data.success){
  alert("inside success");
  }else{
   alert("inside else");
  }
}).
error(function (data, status, headers, config) {
alert("Error, please report to admin. Error code is " + status);
//alert("data, please report to admin. Error code is " + data);      
});
};

Comments

Please put more details like which language, what you have tried, what you are expecting, what is the error. The problem is having just some code and one statement, I can not make out anything from this...Please put necessary info so that people can help...