Retrieving Drupal user session from Flex3

I've been having an issue for a week now.

I have a tiny Flex 3 app which simply retrieves the current drupal user session and displays the user data.
I'm using D6, services, amfphp with sessid turned off.

When I run the app on my laptop, the system.connect() method returns the proper Drupal user/session. If I switch user in Drupal and refresh the app I get updated and accurate user data displayed. My Sessions table only shows one Drupal session and my Flex app uses that session correctly. Seems smooth enough.

My problem is when other users access the app. Two scenarios here:
Use sessid enabled:
When system.connect() is called an anonymous sessions is created in the Sessions table regardless if there is an active Drupal logged in session in the DB. It's as if the global $user or session_id() calls can't find the right Drupal session. Thus the insertion of an anonymous session.

Use sessid disabled:
A new cookie based session is created and the app retrieves only that cookie session. Which in turn is also anonymous.

In any case, other users (non-me from my laptop) never get their correct Drupal session.

I do not want to use a new session for the app but rather use the existing (logged in, or not) Drupal session.

Am I missing something here?

Thanks for any help !