Add Admin Group

My friend has a forum and she just make it a few days ago. She said that when she went into the forum as the founder, she was in the moderators group. I looked at her forum, and that's the only group she has. She doesn't know how to add the admin group and she is asking me to help. Anyone know how? Also, on another friend's forum the founder said she too had this problem. She said she asked someone to do it for her, and the person did it. I just need to know how?

Hello,
Admin Panel=>Users&Groups=>Grups=>Group administration=>Administrators=>Modify=>Group Members Color=>Select one color=>Color Group Members=>Yes=>Save.
Regards!