Access denied for user 'SYSTEM'@'localhost'..

<?php
// On démarre la session
session_start();
mysql_connect('127.0.0.1','root','motdepasse');
mysql_select_db('tadb');
$pseudo = $_POST['pseudo'] ; 
?>
<?php
$sql ="UPDATE activation SET activation = '1' WHERE pseudo = '$pseudo'";
mysql_query($sql); or die("Erreur SQL.<br>$sql<br>".mysql_error());
?>

Warning: mysql_connect() [function.mysql-connect]: php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\wamp\www\SIte !!\payementfini.php on line 4

Warning: mysql_connect() [function.mysql-connect]: [2002] php_network_getaddresses: getaddrinfo failed: No such host is kn (trying to connect via tcp://imysql04:3306) in C:\wamp\www\SIte !!\payementfini.php on line 4

Warning: mysql_connect() [function.mysql-connect]: php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\wamp\www\SIte !!\payementfini.php on line 4

Warning: mysql_select_db() [function.mysql-select-db]: Access denied for user 'SYSTEM'@'localhost' (using password: NO) in C:\wamp\www\SIte !!\payementfini.php on line 5

Warning: mysql_select_db() [function.mysql-select-db]: A link to the server could not be established in C:\wamp\www\SIte !!\payementfini.php on line 5

Warning: mysql_query() [function.mysql-query]: Access denied for user 'SYSTEM'@'localhost' (using password: NO) in C:\wamp\www\SIte !!\payementfini.php on line 10

Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in C:\wamp\www\SIte !!\payementfini.php on line 10
Erreur SQL.
UPDATE activation SET activation = '1' WHERE pseudo = 'max1395'
Access denied for user 'SYSTEM'@'localhost' (using password: NO)