Logging in “Cannot modify header information” error

I’ve recently just installed WordPress at https://www.foxalive.com/Blog following the 5-minute install instructions provided.

When I try to login, however, I get this error at the top of the page:

Warning: Cannot modify header information – headers already sent by (output started at /home5/foxalive/public_html/Blog/wp-config.php:1) in /home5/foxalive/public_html/Blog/wp-login.php on line 267

Warning: Cannot modify header information – headers already sent by (output started at /home5/foxalive/public_html/Blog/wp-config.php:1) in /home5/foxalive/public_html/Blog/wp-login.php on line 279

<?php
// ** MySQL settings ** //
define('DB_NAME', 'foxalive_Blog');    // The name of the database
define('DB_USER', 'foxalive_Flat');     // Your MySQL username
define('DB_PASSWORD', '****'); // ...and password
define('DB_HOST', 'localhost');    // 99% chance you won't need to change this value
define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');

// Change each KEY to a different unique phrase.  You won't have to remember the phrases later,
// so make them long and complicated.  You can visit https://api.www.ads-software.com/secret-key/1.1/
// to get keys generated for you, or just make something up.  Each key should have a different phrase.
define('AUTH_KEY', '?xZM*k-Ph!=2B6x6MAQj4oDdN\"8ds:CS;&fNtwM>Kk%cP6;CHBl,cA?Vq0R@Dz~'); // Change this to a unique phrase.
define('SECURE_AUTH_KEY', 'l.L_,/2C7\'\';asp8:E|~ZUD,s7cQdYzX\\c{5w:LKE<riX\\!S3Kz[oAQSIb{a3m!U'); // Change this to a unique phrase.
define('LOGGED_IN_KEY', 'bJK\'MU<code></code>r[Oml.48B/q^o&d4cwJrg\\h;IxH^D,$t8y,<x=FU|1;=\"lW{4V.h-A'); // Change this to a unique phrase.

// You can have multiple installations in one database if you give each a unique prefix
$table_prefix  = 'wp_';   // Only numbers, letters, and underscores please!

// Change this to localize WordPress.  A corresponding MO file for the
// chosen language must be installed to wp-content/languages.
// For example, install de.mo to wp-content/languages and set WPLANG to 'de'
// to enable German language support.
define ('WPLANG', '');

/* That's all, stop editing! Happy blogging. */

if ( !defined('ABSPATH') )
	define('ABSPATH', dirname(__FILE__) . '/');
require_once(ABSPATH . 'wp-settings.php');
?>

I’ve been looking around and the problems usually arise with either a space/break line, or after a file has been editted, but I’ve not done anything except change the wp-config.php (above).

Any ideas?