trying pulling back all users

I'm using the wp membership plugin called s2member but the following does not pull back any users at all yet I have 10 users with the role s2member_level1

Any idea what I'm missing?

<?php
    foreach(get_users("role=s2member_level1") as $user)
        {
            $user = new WP_User($user);
            // print_r($user); for a list of properties available for display.
        }
    ?>

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Also, in phpmyadmin, I see listed out in the usermeta table the following on each user:

a:1:{s:15:"s2member_level1";s:1:"1";}

Is that the role that I'm referring to in that query above?

The code can go anywhere in your themes template files.

but I have php execution installed so I should be able to view that inside a page, right?

okay, I placed the code above in a separate php page outside of wordpress and nothing gets displayed in the output.  Permissions on all directories off of root are at 777 too.

<?php
    $wp_user_search = $wpdb->get_results("SELECT ID, display_name FROM $wpdb->users ORDER BY ID");
    foreach ( $wp_user_search as $userid ) {
    $user_id = (int) $userid->ID;
    $user_login = stripslashes($userid->user_login);
    $display_name = stripslashes($userid->display_name);
    $return = '';
    $return .= "\t" . '<li>'. $display_name .'</li>' . "\n";
    print($return);
    }
?>

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Okay, I placed the code inside my functions.php page and names were displayed so that's good.  I realized that it had to fall under wordpress framework.  There is no header.php with this theme I'm using.

So if I can get it to pull back data through the functions.php page, then the issue is why can't I have that data display on a page?

If I the code in above, then view the source code on the page, the source code stops at <div class="entry-content">

What would that indicate?

Okay, I tried var_dump($wp_user_search); and yes it display the results.  Also, I put up a header.php page and can list out the display names just fine.  It's just that when I try to add that php code in the html tab on a page, no names appear and in the source code, it stops at this line of code: <div class="entry-content">

Okay, I have it pulling back data now on the page using the following:

<?php
foreach (get_users () as $user)
{
$user = new WP_User ($user->ID);
echo get_user_field ("age", $user->ID);
print_r(get_s2member_custom_fields($user->ID));
print_r($user);
}
?>

However, it pulls back all the data on the user in an array.  How then would I parse out just the display name using the above code?

Thanks!