czy top może być wina SQL ?

<?php function login_guest($goto='') { if($ga10<>'' AND $gb10<>'') { $query = "SELECT * FROM $guest_tbl WHERE nick='$ga10' AND stat='ok'"; $nick_ = $r['nick']; $pass_ = $r['pass']; $mail_ = $r['mail']; $status = $r['stat']; if ($status=='ban') { exit; } if ($status=='-') { exit; } if($nick_==$ga10 AND $pass_==$gb10) { $_SESSION[gnick] = $nick_; $_SESSION[gmail] = $mail_; $_SESSION[nick] = $nick_; $_SESSION['access'] = $r['access']; $ip_ = "UPDATE $guest_tbl SET ip='$REMOTE_ADDR' WHERE nick='$ga10'"; if($_POST['gautolog']=='t') { } if($goto=='') { } else exit; } else { return 'no'; } } else { return 'no'; } } ?>
CREATE TABLE `users` ( `id` int(8) NOT NULL AUTO_INCREMENT, `nick` varchar(16) NOT NULL DEFAULT '', `pass` varchar(64) NOT NULL DEFAULT '', `mail` varchar(64) NOT NULL DEFAULT '', `sign` text NOT NULL, `www` varchar(128) NOT NULL DEFAULT '', `gg` varchar(64) NOT NULL DEFAULT '', `icq` varchar(64) NOT NULL DEFAULT '', `kraj` varchar(64) NOT NULL DEFAULT '', `miej` varchar(64) NOT NULL DEFAULT '', `wiek` varchar(32) NOT NULL DEFAULT '', `post` text NOT NULL, `date` datetime NOT NULL DEFAULT '0000-00-00 00:00:00', `keyid` varchar(128) NOT NULL DEFAULT '', `stat` varchar(8) NOT NULL DEFAULT '', `admin` varchar(8) NOT NULL DEFAULT 'no', `avatar` varchar(255) NOT NULL DEFAULT '', `trans` text NOT NULL, `premium` int(1) NOT NULL DEFAULT '1', `user_last_activ` int(11) NOT NULL DEFAULT '0', `online_time` int(11) NOT NULL DEFAULT '0', `groups` varchar(128) NOT NULL DEFAULT 'Users', `nick_allegro` varchar(64) NOT NULL DEFAULT 'brak', `ip` varchar(18) NOT NULL DEFAULT 'brak', `plec` varchar(64) NOT NULL DEFAULT 'Anonim', PRIMARY KEY (`id`), UNIQUE KEY `nick` (`nick`) ) ENGINE=MyISAM DEFAULT CHARSET=latin2;
INSERT INTO `users` (`id`, `nick`, `pass`, `mail`, `sign`, `www`, `gg`, `icq`, `kraj`, `miej`, `wiek`, `post`, `date`, `keyid`, `stat`, `admin`, `avatar`, `trans`, `premium`, `user_last_activ`, `online_time`, `groups`, `nick_allegro`, `ip`, `plec`) VALUES (1, 'konto_testowe', '5021853adcb1052c3a5025090b611b4c', 'testowo@tlen.pl', '', '', '', '', 'Polska', 'Wrocław', '21', '', '2006-11-11 13:13:30', '11632472094555be694505e', 'ok', 'no', '', '', 1, 1163249189, 75, 'Users', 'brak', 'brak', 'Anonim');