rest - Error in accessing RESTful api from angularjs

Question

I want to access to my services from RESTful API. I have added this code in angularJS. But it is returning failure always. I didn't understand why. Any help?

     $http({ method: 'GET', url: 'http://localhost:3000/profiles/someUser'}).
        success(function (data, status, headers, config) {  
            alert("success")
            $scope.items = data;
        }).
        error(function (data, status, headers, config) {
            alert("failure")
        });

I have profiles/:username service in my RESTful API