Error in angularJS using CORS - Response for preflight has invalid HTTP status code 403 on angular post request

Dear,

I have this code in angularjs:

$http.post('http://localhost:8080/employee/'
    , $scope.alumno
    ,{headers: {'Content-Type': 'application/json'}}
    ).success(function(data){

        if ( data.err === false ) {
            $scope.actualizado = true;

            setTimeout(function() {
                $scope.actualizado = false;
                $scope.$apply();
            }, 3500);

        };
    });

My API has these data:

//Add employee:
Url: http://localhost:8080/employee
Type request: POST
Add a new employee:
{
 "firstName": "Javier",
 "lastName": "Piedra",
}

Use chrome with an extension that enables CORS for GET works perfect but for POST shows this error:

XMLHttpRequest cannot load http://localhost:8080/employee/. Response for 
preflight has invalid HTTP status code 403

In my app.config I use this:

app.config( function($routeProvider,$httpProvider){

$httpProvider.defaults.headers.common = {};
$httpProvider.defaults.headers.post = {};
$httpProvider.defaults.headers.put = {};
$httpProvider.defaults.headers.patch = {};

Do you have a solution for this error?

Greetings