Unknown column in 'where' clause

[Dorky Guy]

This works on my local testing box (XP, MySQL 5.1.39) perfectly well, but not on my hosted website (guessing *NIX and MySQL 5.1.55); I'm baffled:

CREATE TABLE mnu_site
(
record_identifier INT NOT NULL PRIMARY KEY,
menu_item SMALLINT NOT NULL UNIQUE,
menu_label VARCHAR(64) NOT NULL UNIQUE,
menu_anchor VARCHAR(96) NOT NULL,
flag_disabled CHAR(1) NOT NULL DEFAULT '0'
);
CREATE PROCEDURE sprc_menu_site()
SELECT menu_item,
menu_label,
menu_anchor
FROM mnu_site
WHERE flag_disabled = '0'
ORDER BY menu_item;

Executing either the procedure (CALL sprc_menu_site()), or even just the procedure body directly gives me
#1054 - Unknown column '0' in 'where clause'
?????
I'm stumped. There are other procedures to drive other menus and a search engine so I don't have to expose the tables directly, but it's just plain-vanilla SQL like the above. Many thanks for any attention,