Simple login error ERR_TOO_MANY_REDIRECTS

Im making a simple login for my adminpage. But I get the ERR_TOO_MANY_REDIRECTS error when I try to logg back in when I logged out. When I remove my cookies it works again so I think my logout file doenst remove the cookie correctly. I'm using chrome.

Login.php:

<?php 

//Connects to your Database 
mysql_connect("db location", "username", "password") or die(mysql_error()); 
mysql_select_db("database name") or die(mysql_error()); 

//Checks if there is a login cookie
if(isset($_COOKIE['ID_your_site'])){ //if there is, it logs you in and directes you to the members page
    $username = $_COOKIE['ID_your_site']; 
    $pass = $_COOKIE['Key_your_site'];
    $check = mysql_query("SELECT * FROM users WHERE username = '$username'")or die(mysql_error());

    while($info = mysql_fetch_array( $check )){
        if ($pass != $info['password']){}
        else{
            header("Location: login.php");
        }
    }
 }

 //if the login form is submitted 
 if (isset($_POST['submit'])) {

    // makes sure they filled it in
    if(!$_POST['username']){
        die('You did not fill in a username.');
    }
    if(!$_POST['pass']){
        die('You did not fill in a password.');
    }

    // checks it against the database
    if (!get_magic_quotes_gpc()){
        $_POST['email'] = addslashes($_POST['email']);
    }

    $check = mysql_query("SELECT * FROM users WHERE username = '".$_POST['username']."'")or die(mysql_error());

 //Gives error if user dosen't exist
 $check2 = mysql_num_rows($check);
 if ($check2 == 0){
    die('That user does not exist in our database.<br /><br />If you think this is wrong <a href="login.php">try again</a>.');
}

while($info = mysql_fetch_array( $check )){
    $_POST['pass'] = stripslashes($_POST['pass']);
    $info['password'] = stripslashes($info['password']);
    $_POST['pass'] = md5($_POST['pass']);

    //gives error if the password is wrong
    if ($_POST['pass'] != $info['password']){
        die('Incorrect password, please <a href="login.php">try again</a>.');
    }

    else{ // if login is ok then we add a cookie 
        $_POST['username'] = stripslashes($_POST['username']); 
        $hour = time() + 3600; 
        setcookie(ID_your_site, $_POST['username'], $hour); 
        setcookie(Key_your_site, $_POST['pass'], $hour);     

        //then redirect them to the members area 
        header("Location: members.php"); 
    }
}
}
else{
// if they are not logged in 
?>

 <form action="<?php echo $_SERVER['PHP_SELF']?>" method="post"> 

 <table border="0"> 

 <tr><td colspan=2><h1>Login</h1></td></tr> 

 <tr><td>Username:</td><td> 

 <input type="text" name="username" maxlength="40"> 

 </td></tr> 

 <tr><td>Password:</td><td> 

 <input type="password" name="pass" maxlength="50"> 

 </td></tr> 

 <tr><td colspan="2" align="right"> 

 <input type="submit" name="submit" value="Login"> 

 </td></tr> 

 </table> 

 </form> 

 <?php 
 }
 ?> 

Logout.php

<?php 
 $past = time() - 100; 
 //this makes the time in the past to destroy the cookie 
 setcookie(ID_my_site, gone, $past); 
 setcookie(Key_my_site, gone, $past); 
 header("Location: login.php"); 
 ?> 

members.php

<?php
//Connects to your Database 
mysql_connect("db location", "username", "password") or die(mysql_error()); 
mysql_select_db("database name") or die(mysql_error()); 

 //checks cookies to make sure they are logged in 
 if(isset($_COOKIE['ID_your_site'])){ 

    $username = $_COOKIE['ID_your_site']; 
    $pass = $_COOKIE['Key_your_site']; 
    $check = mysql_query("SELECT * FROM users WHERE username = '$username'")or die(mysql_error()); 

    while($info = mysql_fetch_array( $check )){ 

        //if the cookie has the wrong password, they are taken to the login page 
        if ($pass != $info['password']){
            header("Location: login.php"); 
        }
        //otherwise they are shown the admin area
        else{

             echo "Admin Area<p>"; 
     echo "Your Content<p>"; 
     echo "<a href=logout.php>Logout</a>"; 
        }
    }
}

 else{ //if the cookie does not exist, they are taken to the login screen 
    header("Location: login"); 
 }
 ?>