Go to the admin area then click on manage members, On the left there should be a list. click on members then on the right there should be a list of things that the member can do inside the group as in join, submitting art, ect... after you get done make sure you save which is at the bottom midleft *its under where the list of members would be at* I dont mean to just give you this info specially since you never asked for it but I see that others are having trouble joining *points down* and i assume that your new to the whole having a group thing. If you already knew all this, Then sorry I put this comment. If you didnt then i hoped I helped and if you need anything dont be afraid to ask