Login Class problem

programming flash
1

So i have this class , It get’s two values from an input text and sends the data to my login php where everything works fine . It is supposed to return 0 (bad login) , 1 (good login) .

package
{
    import flash.events.Event; 
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.net.URLVariables;
    import flash.net.URLLoaderDataFormat
    import flash.net.URLRequestMethod
    import flash.display.Stage;

    public class LoginMenu
    {
        public Succes=0;

        function LoginMenu()
        {
           
        }
 
        public function VarifyLogin(username:String,pasword:String):String
        {
            
            var request:URLRequest=new URLRequest("login.php");
            request.method=URLRequestMethod.POST;
            var variables:URLVariables = new URLVariables();
            variables.username=username;
            variables.pasword=pasword;
            request.data=variables;
            var loader:URLLoader=new URLLoader(request);
            loader.addEventListener(Event.COMPLETE, onComplete);
            loader.dataFormat=URLLoaderDataFormat.VARIABLES;
            loader.load(request)
            function onComplete(event:Event):Number
            {
              Succes=event.target.data.verif
            }
           return Succes;
        }
    }
}

If i put the basic URLRequest on the timeline it works fine . I have no idea what is going wrong since i just started learning OOP type flash as3 .
Thank you :glasses: