Solved Survival games only works with OP?

Hello everyone. I have just started using the Survival Games plugin (http://dev.bukkit.org/bukkit-plugins/survival-games/) on my server. My and some members were about to play a game however, they got the message '[SG] [Warning] You don't have permission to join arena 1'. This happens when using the sign and the '/sg join 1' command. I de-opped myself (still in my group with * permission) and tried to join a games but I still got the message. I have added the following permissions to the group that were trying to join:

• sg.arena.join.1
• sg.arena.join
• sg.arena.join.*
• sg.arena.vote
• sg.vote
• sg.spectate
• sg.arena.spectate
• sg.lobby.join
• sg.lobby.join.*

​

When I OP myself again, I can join the arena. My players are urgently wanting to play Survival Games so any help would be useful.

Thank You,
RedPanda1
Owner @ Skycade

I solved this problem myself. Here is what I did:
In my permissions plugin I had the sg.arena.join permissions ect... however, the plugin started working when I added the following permissions:

• sg.join.*
• sg.join
• sg.join.1

I hope this helps anyone who is having this problem.