problemas com o php ajuda?

pessoal bom dia, estou montando uma loja virtual, e na pagina config.php aparece o seguinte erro:

Parse error: parse error, unexpected T_STRING in C:\Documents and Settings\usuario\Meus documentos\Downloads\loja\config.php on line 17

a linha 17 é esta: $docRoot = $_SERVER['DOCUMENT_ROOT'];

o codigo inteiro é este:

<?php

ini_set('display_errors', 'On');

error_reporting(E_ALL);

// start the session

session_start();

// database connection config

$dbHost = 'localhost';

$dbUser = 'root';

$dbPass = '';

$dbName = 'phpwebco_shop';

// setting up the web root and server root for

// this shopping cart application

$thisFile = str_replace('\', '/', __FILE__);

$docRoot = $_SERVER['DOCUMENT_ROOT'];

$webRoot = str_replace(array($docRoot, 'library/config.php'), '', $thisFile);

$srvRoot = str_replace('library/config.php', '', $thisFile);

define('WEB_ROOT', $webRoot);

define('SRV_ROOT', $srvRoot);

// these are the directories where we will store all

// category and product images

define('CATEGORY_IMAGE_DIR', 'images/category/');

define('PRODUCT_IMAGE_DIR', 'images/product/');

// some size limitation for the category

// and product images

// all category image width must not

// exceed 75 pixels

define('MAX_CATEGORY_IMAGE_WIDTH', 75);

// do we need to limit the product image width?

// setting this value to 'true' is recommended

define('LIMIT_PRODUCT_WIDTH', true);

// maximum width for all product image

define('MAX_PRODUCT_IMAGE_WIDTH', 300);

// the width for product thumbnail

define('THUMBNAIL_WIDTH', 75);

if (!get_magic_quotes_gpc()) {

if (isset($_POST)) {

foreach ($_POST as $key => $value) {

$_POST[$key] = trim(addslashes($value));

}

}

if (isset($_GET)) {

foreach ($_GET as $key => $value) {

$_GET[$key] = trim(addslashes($value));

}

}

}

// since all page will require a database access

// and the common library is also used by all

// it's logical to load these library here

require_once 'database.php';

require_once 'common.php';

// get the shop configuration ( name, addres, etc ), all page need it

$shopConfig = getShopConfig();

?>

qual é o erro??