Review the member list often, as a member you must promote new members. You do this as follows:
a) From the main page, click the Administration link (right side) b) Click on "Members" link, click on "Zugezogenes" to see the newbies. With this status, they're not able to admin the group. So we need to promote them. c) Click the "Promote" button listed next to any newbies that are shown and set them to "Berliners".