Essentials Game Mode Permission Doesn't Work?

I have a Minecraft server. We wanted to give gamemode to certain people and ranks, so that they could give themselves gamemode. We use essentials for this. We have already tried the permissions "essentials.gamemode.1" and "essentials.gamemode.creative". But none of that worked.
Does anyone know the Permian?

You have to enter all 3 permissions in your permission system:

essentials.gamemeode

essentials.gamemode.creative

essentials.gamemode.survival

Then / gm 1 etc. Also works in the chat.