Symfony ajax响应但带标题：HTTP / 1.0 200 OK Cache-Control：no-cache Date

i'm in troubles with Symfony and an ajax call.

I'm in Local server on Windows 8 with XAMPP 1.8.2.

Every works good, but when i take response i have this, below the right text:

HTTP/1.0 200 OK Cache-Control: no-cache Date: Tue, 19 Nov 2013 14:58:18

Why?

My codes:

In HTML (Twig) at the bottom:

$.ajax({
url: "{{ path('score') }}",
data: { id: scoreid, value: value },
dataType: 'json',
type: 'POST',
success: function (data) {
    if(data.responseCode==200 ){           
    $('#score').html(data.score);
    $('#score').css("color","green");
            }
else if(data.responseCode==400){
    $('#score').html(data.score);
    $('#score').css("color","red");
     }
     else{
    alert("An unexpeded error occured.");
    $('#score').html(data);
      }
            },
  error: function (jxhr, msg, err) {
    $('#score').html('<span style="color:red">Error!</span>');
     }
});

Controller "score":

class scoreController extends Controller
{

    public function onepointAction(Request $request) {

        ....some logical...

            $points = self::pointsAction($id);

            $return=array("responseCode"=>200, "score"=>"Score: ".$num.".", "goal"=>"".$points);
        }

        else {

            $return=array("responseCode"=>400, "score"=>"No good!");
        }

        $return = json_encode($return);
        return new Response($return,200,array('Content-Type'=>'application/json'));
    }

    public function pointsAction($id) {

        ......some logical query... ended by:
            ->getQuery();

        $pointsOk = $query->getResult();

        $avgScore = $avgScore[0]["score_avg"];

        $numScore = $avgPoints[0]["score_count"];

        $points = ("Scores: ".$avgScore."Goals: ".$numScore);

        return new Response($points);
    }
}

Where I make error?