Thanks for your reply.

• I had omitted error-checking for brevity. At each point, however, LastError() was returning 0.
• Put didn't help; same behavior.
• I had been shying away from Net::LDAP, simply because there seemed to be even less documentation around for it than Win32::OLE and ASDI (although they're both pretty sparse, alas). But the script in the replies to that comment did work, and did help me along. Thank you!