Strange error when exporting to Mediawiki

Hi,

I’m trying to use the Mediawiki extension to export text to my Mediawiki (version 1.21.1). However, after entering my credentials, I always get the error “username and/or password incorrect” (translated from Dutch…).
Because it is a corporate wiki, my wiki is closed, so everyone needs to log in before content can be seen / edited.
The only error I can see in the apache logs are (error_log) :

[Mon Nov 17 13:30:55 2014] [error] [client 10.151.10.76] PHP Warning: ldap_start_tls(): Unable to start TLS: Can’t contact LDAP server in /var/www/wiki/extensions/ldapauthentication/LdapAuthentication.php on line 593

Additional information:
The wiki is connected to our company’s Active Directory LDAP. Logging in from the wiki login page (using the same credentials) is no problem.

Questions:

  1. When specifying the wiki location in LibreOffice, is it sufficient to specify the “normal” wiki URL ?
    Like: http://myserver/wiki/, or do I need to specify the location of the login page as well ?
    I tried entering http://myserver/wiki/index.php?title=Special:Login, or something like that, but that didn’t work.
  2. I searched the internet before coming here, and people that hav had the same error say you have to
    enter the following line in your /etc/openldap/ldap.conf : TLS_REQCERT never.
    Doesn’t help either…

Anyone out there that has seen this error using the wiki extension ?
Any help is more than welcome.

Thanks,
Hans