Your Friendship Lamp needs to have a GroupID to be connected to your group of lamps.
If you can't find your GroupID for some reason, it's easy to generate a new one.
You can generate a GroupID and send it directly to the other people on your group by entering their email addresses.
You will be emailed the GroupID, which you can use in the setup process. Please make sure that all the people on your group use the same GroupID.