ldp.exe connectionless bind

I am getting an error when using ldp.exe, connectionless, port 389 bind as currently logged on user.  Are the results normal?

0 = ldap_set_option(ld, LDAP_OPT_ENCRYPT, 0)
res = ldap_bind_s(ld, NULL, &NtAuthIdentity, NEGOTIATE (1158)); // v.3
{NtAuthIdentity: User='NULL'; Pwd=<unavailable>; domain = 'NULL'}
Error <2>: ldap_bind_s() failed: Protocol Error.
Server error: <empty>