how to use LDAP to query the member list of a eDir Group Object?

the attribute "member" seems not to be the appropriate one...

I'm using the ldap browser of Jarek Gawor v2.8.2 this way:

- select an Organisation
- Filter: (objectclass=group)
- Attributes: member

The result is for almost all groups "N/A".

When I create a blank group and add just *ONE* member, it seems to be displayed, but
there are also some other groups, that hold more than one member, that do *NOT*
return a "N/A", but display one (the alphabetical first) member user.

What do I miss?

Regards, Rudi.