ldap_sasl_interactive_bind_s: Unknown authentication method

[Mike Schiraldi <raldi@research.netsol.com>]

I'm having trouble getting ldapsearch (2.0.7) to work with a server here.
Netscape's (perhaps non-standards-compliant) ldapsearch tool works.
OpenLDAP's gives the error "ldap_sasl_interactive_bind_s: Unknown
authentication method".

Browsing through the list archives, i came across 
http://www.openldap.org/lists/openldap-bugs/200010/msg00217.html
which says, in part:

> try ldapsearch -x -ZZ -s base -b "" supportedSASLMechanisms
> 
> If "EXTERNAL" is listed as a value, try:
> 
> ldapsearch -Y EXTERNAL -ZZ -s base -b "" supportedSASLMechanisms

Well, sure enough, the first command gives
"supportedSASLMechanisms: EXTERNAL"

but the second gives "ldap_start_tls: Protocol error".

Unfortunately, the email thread ends there. What's the next step? Does
this look like a client problem or server problem?

TIA