LDAP authenticating FLEX/AIR users

Hi All,

I would like to build an Flex/AIR application that initially provides LDAP authentication.

I am new to these Flex/Actionscript/DataServices however I have managed to get a nice datagrid querying & updating a MySQL Db from a Flex App using AmfPHP... Nice. I'm learning :-)

My question at the moment is what is the best/easiest way to enable LDAP authentication?

Could I use the following setup?
Flex/AIR IDE, LiveCycle Data Services ES Express, LDAP server?

Or do I NEED a j2SE server in there somewhere? or even a Coldfusion server?
I would like to try and avoid the need to include j2SE or Coldfusion servers at this stage.

This article describes performing an LDAP Query (http://www.adobe.com/devnet/livecycle/articles/perform_ldap_resolution.html) so LDAP authentication must also be possible! Just need some help to point me in the right direction.

Hope this makes sense.

TIA
Danny