public static function Set($sKey, $mValue){
            $oThis = self::CreateInstanceIfNotExists();

            if($oThis->bStarted){
                if($sKey != "name" && $sKey != "id" && $sKey != "authentication"){
                    $_SESSION[$oThis->sName][$sKey] = $mValue;
                    return true;
                }
                else{
                    return false;
                }
            }
            else{
                return false;
            }
        }