actionscript3 for calling jsp

hi

http status coming like this when i send variable. anyone help me

[HTTPStatusEvent type="httpStatus" bubbles=false cancelable=false eventPhase=2 status=403 responseURL=null]

my code is

var url:String="https:// something"
         
loader:URLLoader = new URLLoader()

   var reques:URLRequest = new URLRequest(url);
            reques.method = URLRequestMethod.POST;
            var vars:URLVariables = new URLVariables();
             
            vars.username = _usernameText.text;
            vars.password =_passwordText.text;
            request.data = vars;           
            try
            {
                loader.load(request);
               
            }
            catch (error:Error)
            {
                trace("connection" + error);
               
            }

            loginLoader.addEventListener(HTTPStatusEvent.HTTP_STATUS,onHttpStatus);
            loginLoader.addEventListener(Event.COMPLETE,CompleteHandler);