Nolasiit datus no Cookie

Taaks lapas saakumaa  man ir

if(!isset($_cookie["user"])){
setcookie("user", $user);
setcookie("password", $pass);
}

un taalaak iet

$user = $_Cookie["user"];
$pass = $_Cookie["password"];

un veel taalak ir

$login = mysql_query("Select user From homepage where user='$user'");
$search = mysql_num_rows($login);
if($search==0){
print("<h2>Invalid Account</h2>");
$error="1";
}

Nu karo4 problēma tāda kad viņš no cookie nenolasa to username un rāda invalid account