mysql_fetch_row(): supplied argument is not a valid MySQL

mysql_fetch_row(): supplied argument is not a valid MySQL result resource in C:\ComplexWebServer\http_docs\xxxxxxxxxxxxxx\admin\menu.php on line 17

15: auth();
16: $a=mysql_query("SELECT count(id) FROM vzkazy WHERE pro_id='$INFO[0]' AND stav='n' AND smazat!='$INFO[0]'");
17: $b=mysql_fetch_row($a);

-- phpMyAdmin SQL Dump
-- version 2.11.6
-- http://www.phpmyadmin.net
--
-- Počítač: localhost:3306
-- Vygenerováno: Středa 11. dubna 2012, 20:16
-- Verze MySQL: 4.1.22
-- Verze PHP: 5.2.6

SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";

--
-- Databáze: `rs`
--

-- --------------------------------------------------------

--
-- Struktura tabulky `autori`
--

CREATE TABLE IF NOT EXISTS `autori` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `login` varchar(20) NOT NULL default '',
  `pass` varchar(32) NOT NULL default '',
  `jmeno` varchar(255) NOT NULL default '',
  `email` varchar(255) NOT NULL default '',
  `oautorivi` text NOT NULL,
  `prava` tinyint(3) unsigned NOT NULL default '1',
  `stav` char(1) NOT NULL default 'n',
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=2 ;

--
-- Vypisuji data pro tabulku `autori`
--

INSERT INTO `autori` (`id`, `login`, `pass`, `jmeno`, `email`, `oautorivi`, `prava`, `stav`) VALUES
(1, 'admin', '8bb616937cebe88d76482d03bb222e03', 'Adrián Prelovský', 'prelovskynia@gmail.com', 'Nia', 3, 'a');

-- --------------------------------------------------------

--
-- Struktura tabulky `clanky`
--

CREATE TABLE IF NOT EXISTS `clanky` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `id_autor` int(10) unsigned NOT NULL default '0',
  `id_rubrika` int(10) unsigned NOT NULL default '0',
  `datum` int(10) unsigned NOT NULL default '0',
  `counter` int(10) unsigned NOT NULL default '0',
  `priorita` smallint(5) unsigned NOT NULL default '0',
  `nadpis` varchar(255) default NULL,
  `anotace` text,
  `clanek` text,
  `poznamka` text,
  `stav` char(1) default 'n',
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;

--
-- Vypisuji data pro tabulku `clanky`
--


-- --------------------------------------------------------

--
-- Struktura tabulky `fora`
--

CREATE TABLE IF NOT EXISTS `fora` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `id_clanku` int(10) unsigned NOT NULL default '0',
  `datum` int(10) unsigned NOT NULL default '0',
  `jmeno` varchar(255) NOT NULL default '',
  `email` varchar(255) NOT NULL default '',
  `predmet` varchar(255) NOT NULL default '',
  `text` text NOT NULL,
  `notify` char(1) NOT NULL default 'n',
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

--
-- Vypisuji data pro tabulku `fora`
--


-- --------------------------------------------------------

--
-- Struktura tabulky `novinky`
--

CREATE TABLE IF NOT EXISTS `novinky` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `novinka` text,
  `datum` int(10) unsigned NOT NULL default '0',
  `stav` char(1) NOT NULL default 'n',
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;

--
-- Vypisuji data pro tabulku `novinky`
--


-- --------------------------------------------------------

--
-- Struktura tabulky `rubriky`
--

CREATE TABLE IF NOT EXISTS `rubriky` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `rubrika` varchar(50) NOT NULL default '',
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=4 ;

--
-- Vypisuji data pro tabulku `rubriky`
--