Currently have a Domino 5.5 on IBM OS/2, yes that's OS/2. I'm running LDAP on port 389. Server is up and running in production. When running the migration tool version for domino, I can connect to my Zimbra server but when I try to connect to the Domino server I get "Unable to bind to LDAP server. PCANotes at port 389. Error Code :0x51.Server Down"

Any clues to what may be wrong with the Domino LDAP server that would throw this error ?