problema de conexion??

[pereztroff]

estoy utilizando un script pero me sale este error:
You have an error in your SQL syntax near '-_clasifica' at line 1

tengo un archivo llamado user.php con el siguiente contenido:
<?php


$host = 'localhost';
$user = 'xxxx';
$password = 'xxxxxxx';

$txt_db_name = 'aaaaa_net_-_clasifica';

?>

y otro llamado installer.php con este otro contenido:

$submit = $_POST['submit'];
$PHP_SELF = $_SERVER['PHP_SELF'];

if($submit)
{
//Connect to the database and select used database
include('user.php');
$connection = mysql_connect("$host","$user","$password")
or die(mysql_error());

$username = trim($_POST['username']);
$password = trim($_POST['password']);
$password2 = trim($_POST['password2']);
$season = trim($_POST['season']);
$team = trim($_POST['team']);

//
//Fields filled?
//
if($username == '' || $password == '' || $password2 == '' || $season == '' || $team == '')
{
echo'Fill all fields.';
exit();
}

//
//Passwrds are the same?
//
if($password != "$password2")
{
echo'You didn\'t retype correctly.';
exit();
}

if(strlen($password) < 6)
{
echo'Your password must be at least six characters long.';
exit();
}


//
//Create database if not exists
//
mysql_query("CREATE DATABASE IF NOT EXISTS $txt_db_name",$connection)
or die(mysql_error());

//
//Select the database
//
mysql_select_db("$txt_db_name");

//
//Deducted points table
//
mysql_query("
CREATE TABLE tplls_deductedpoints (
id int(11) NOT NULL auto_increment,
seasonid int(10) unsigned NOT NULL default '0',
teamid smallint(4) unsigned NOT NULL default '0',
points tinyint(3) NOT NULL default '0',
PRIMARY KEY (id),
KEY seasonid (seasonid),
KEY opponentid (teamid)
) TYPE=MyISAM
",$connection)
or die(); ....................................


¿que falla?? ¿alguien me puede ayudar?
GRACIAS