erro no install.php

erro no install.php ... 

Fatal error: Call to a member function query() on a non-object in C:\xampp\htdocs\install.php on line 4

install.php

  Citar

 

<?PHP

//######################## SHOW TICKERS AND NEWS #######################

$time = time();

    $query = $SQL->query("SELECT  FROM `players` ORDER BY `experience` DESC")->fetch();

    $query2 = $SQL->query('SELECT `id`, `name` FROM `players` ORDER BY `id` DESC LIMIT 1;')->fetch();

    $housesfree = $SQL->query('SELECT COUNT(*) FROM `houses` WHERE `owner`=0;')->fetch();

    $housesrented = $SQL->query('SELECT COUNT(*) FROM `houses` WHERE `owner`=1;')->fetch();

    $players = $SQL->query('SELECT COUNT(*) FROM `players` WHERE `id`>0;')->fetch();

    $accounts = $SQL->query('SELECT COUNT(*) FROM `accounts` WHERE `id`>0;')->fetch();

    //$banned = $SQL->query('SELECT COUNT(*) FROM `bans` WHERE `id`>0;')->fetch();

    $guilds = $SQL->query('SELECT COUNT(*) FROM `guilds` WHERE `id`>0;')->fetch();

    ///End Queries ///

        // top kills - guilds

$main_content .= '<div class="NewsHeadline">

    <div class="NewsHeadlineBackground" style="background-image:url(' . $layout_name . '/images/news/newsheadline_background.gif)">

        <table border="0">

            <tr>