Simple ldap_modify problem?

I hope someone can help me. Recently, I ran across an article at DevShed that gives examples of how to write simple LDAP scripts to add, delete, and modify LDAP entries ... http://www.devshed.com/Server_Side/PHP/PHPwithLDAP/PHPwithLDAP2/page1.html The scripts work great for me, except the ldap_modify function. If I add a user through the scripts, I can modify the entry's cn and sn values as much as I like, but I can only edit the email address only once before it no longer allows me to edit it (error no. 32: No such object). The index.php establishes a connection and then allows the results to be passed to edit.php like so: echo "<td><a href=\"edit.php?mail=" . urlencode($info[$i]["mail"][0]) . "\">Edit</a></td>"; edit.php takes those values and POST's them to modify.php: // prepare data $info["cn"] = $_POST['cn']; $info["sn"] = $_POST['sn']; $info["mail"] = $_POST['mail']; $info["objectClass"] = "inetOrgPerson"; // prepare DN $dn = "mail=" . $_POST['mail'] . ", dc=fictional, dc=net"; // modify data in the directory $result = ldap_modify($conn, $dn, $info); As I said, this works if you edit the user's email address once. Beyond that, it fails. I figured that the problem was the email address that gets sent from index.php is not the same value at the end (modify.php) which identifies the entry to change, so using session_start() in edit.php, I made a variable called $_SESSION['orig.mail'] = $_GET['mail'] (brought in from that urlencode in index.php) that carried over into modify.php that made the above line read: // prepare DN $dn = "mail=" . $_SESSION['orig.mail'] . ", dc=fictional, dc=net"; Still, no dice. I can echo the contents of the variables and see that every value is how it is supposed to be, yet something isn't getting passed properly. I started up slapd with '-d 255' and logged the results of the successful ldap_modify and the unsuccessful ldap_modify. They are at: http://www2.netdoor.com/~brianb/ldap/ldap_modify.works and http://www2.netdoor.com/~brianb/ldap/ldap_modify.fails Any advice would be greatly appreciated. Brian -- Brian