Drupal LDAP to copy Win.Server.AD groups to roles

I could connect to Active Directory using following code or using Drupal's LDAP module. I could log in successfully but I could not create groups automagicly or Drupal does not copy Windows Groups to Drupal roles. Should I do that manually? I am very new to Drupal and LDAP.

$dn = "ou=sbsusers,ou=users,ou=mybusiness,dc=my_companyx,dc=local";


    $attributes = array("displayname", "l", "description", "sAMAccountName", "memberOf");
    $filter = "(cn=*)";
    $ad = ldap_connect("ldap://127.0.0.1") or die("Could not connect to AD!");
    #ldap_set_option($ad, LDAP_OPT_PROTOCOL_VERSION, 3); // sometimes required
    $bd = ldap_bind($ad,"my_usernamex@my_companyx.local","MyPasswordBlaBla") or die("Could not bind to AD!");
    $result = ldap_search($ad, $dn, $filter, $attributes);
    $entries = ldap_get_entries($ad, $result);
	echo "< pre >".print_r($entries, 1)."< /pre >";
    for ($i=0; $i<$entries["count"]; $i++)

    {

        #echo $entries[$i]["displayname"][0]."(".$entries[$i]["l"][0].")
";

    }
    ldap_unbind($ad);