🚀 go-pugleaf

Hi

I'm trying to authenticate users via an OpenLDAP-Server (that I do not manage 
myself). It's a simple PHP-script:

<?
$ldap_server = 'ldap.server.de';
$ldaprdn  = 'uid=12345,ou=People,dc=server,dc=de';
$ldappass = 'passwort';

$ds = ldap_connect($ldap_server);
if ($ds) {
     $r = ldap_bind($ds, $ldaprdn, $ldappass);
     echo "Bind result is ".$r."<p>";
     ldap_close($ds);
} else {
     echo "<h4>Unable to connect to LDAP server</h4>";
}
?>

I'm always getting "Unable to bind to server: Invalid credentials" as a result.
ldap_search works perfectly, though.

The LDAP server gets its user's passwords from a Kerberos5 server.

But: if I am logged in as user 12345 on the same machine (Unix), I can 
authenticate at the LDAP server with ldapwhoami:

OpenLDAP-Logfile (Login with ldapwhoami -W)

slapd[14320]: conn=1 fd=8 ACCEPT from IP=(Adresse) (IP=0.0.0.0:389)
slapd[14320]: conn=1 op=0 SRCH base="" scope=0 filter="(objectClass=*)"
slapd[14320]: conn=1 op=0 SRCH attr=supportedSASLMechanisms
slapd[14320]: conn=1 op=0 ENTRY dn=""
slapd[14320]: conn=1 op=0 RESULT tag=101 err=0 text=
slapd[14320]: conn=1 op=1 BIND dn="" method=163
slapd[14320]: conn=1 op=2 BIND dn="" method=163
slapd[14320]: conn=1 op=3 BIND dn="" method=163
slapd[14320]: SASL [conn=1] Error: unable to open Berkeley db /etc/sasldb2: No 
such file or
  directory
slapd[14320]: conn=1 op=3 BIND authcid="12345@SERVER.DE"
slapd[14320]: conn=1 op=3 BIND 
dn="uid=12345,cn=server.de,ou=people,dc=server,dc=de" mech=G
SSAPI ssf=56


Login attempt with my Skript (from a different machine):

slapd[14320]: conn=3 fd=8 ACCEPT from IP=(Adresse) (IP=0.0.0.0:389)
slapd[14320]: conn=3 op=0 BIND dn="uid=12345,ou=People,dc=server,dc=de" method=128
slapd[14320]: conn=3 op=0 RESULT tag=97 err=49 text=
slapd[14320]: conn=3 op=1 SRCH base="ou=People,dc=server,dc=de" scope=2 
filter="(uid=12345)"
slapd[14320]: conn=3 op=1 ENTRY dn="uid=12345,ou=People,dc=server,dc=de"
slapd[14320]: conn=3 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text=
slapd[14320]: conn=3 op=2 UNBIND
slapd[14320]: conn=3 fd=8 closed

Any ideas?

Thanks,
J�rg