I'd go through everything on the Settings page to make
sure you haven't overlooked something or set it incorrectly.
There are a lot of details to cover when setting up a new
group.
Duane
Also give the system a day or so after you create it to approve the group and get it put into the database of groups. To make sure that's been done, just go to the main page and search for your group. Once it shows up you should be good to sign up new members.
Dano