problem with LDAP functions

Hi,

I've been trying some LDAP functions in PHP and am stuck at trying to bind to the LDAP server.

basically ive successfully queried using some LDAP functions when it comes to querying a single server but when I try to do it via an array, i get errors that say "unable to bind to server".

eg. of my script:

this works:

$ds=ldap_connect("afd-s-31");
if ($ds) {
$r=ldap_bind($ds, "john", "h92de" );
}

this doesn't work:

$servers = array("afd-s-31","afd-s-33");

for ($i=0;$i<count($servers);$i++)
{
$ds=ldap_connect($servers[$i]);
if ($ds) {
$r=ldap_bind($ds, "john", "h92de" );
echo $servers[$i]."<br>";
}
}

The error occurs on the line with ldap_bind().

any help appreciated.