imellem 2 mysql rows

Jeg har en masse indhold hvor der i hver row er 2 felter med en from and to

$resw = mysql_query("SELECT * FROM shop_shipping WHERE weight_from >= '$weight_total' AND weight_to <= '$weight_total' ");

$roww = mysql_fetch_array($resw);

min base ser sådan her ud:

CREATE TABLE `shop_shipping` (
  `id` int(11) NOT NULL auto_increment,
  `weight_from` int(11) NOT NULL default '0',
  `weight_to` int(11) NOT NULL default '0',
  `price` int(11) NOT NULL default '0',
  PRIMARY KEY  (`id`)
) TYPE=MyISAM AUTO_INCREMENT=4 ;

INSERT INTO `shop_shipping` VALUES (1, 0, 10, 85);
INSERT INTO `shop_shipping` VALUES (2, 11, 20, 125);
INSERT INTO `shop_shipping` VALUES (3, 21, 30, 165);

der kommer ikke noget resultat