Почему не работает авторизация?

[Roman1209200]

Имеем html:

<form method="POST" action="login.php" class="voiti">

<label for="login1" style="position:absolute; top:160px; left:35px; font-style: oblique; color: rgb(46,160,116); font-size:16.5px;">Èìÿ ïîëüçîâàòåëÿ:</label>
<input type="text" name="e_login" id="e_login" style="position:absolute; top:150px; left:200px; width:300px; height:40px; background-color: #f0fff0; outline: 1px dashed grey; outline-offset: 3px; color: grey;" placeholder=" | Âàø ëîãèí | ">

<label for="password2"style="position:abso lute; top:250px; left:105px; font-style: oblique; color: rgb(46,160,116); font-size:16.5px;">Ïàðîëü:</label>
<input type="password" name="e_password" id="e_password" style="position:absolute; top:230px; left:200px; width:300px; height:40px; background-color: #f0fff0; outline: 1px dashed grey; outline-offset: 3px; color: grey;" placeholder=" | Âàø ïàðîëü | ">

<input type="button" name="enter" class="enter" id="enter" value="Âîéòè" />
<a href="index.html" style="position: absolute; top: 325px; left: 100px;color: grey;font-size: 16.3px; font-style: oblique;">Çàáûëè ïàðîëü?</a>

</form>



login.php(подключение к базе работает)

<?php

include_once("bd.php");

if (isset($_POST["enter")) {
$e_login=$_POST["e_login"];
$e_password=$_POST["e_password'"];
$query=mysql_query("SELECT * FROM WIreg WHERE username = '$e_login'");
$user_data=mysql_fetch_array($query );

if ($user_data['password'] == $e_password) {
session_start();
$_SESSION['username'] = $user_data['username'];
header("location: user/auth.php");
}
else {
echo "wrong password or login";
}

}
?>