[HELP] I can not put GM commands

[ratchet55]

Hi
 
All are in the title ^ ^
 
I watched a tutorial on YouTube and jme got started ^ ^
 
I install a package Nikola LC ep1 (hamachi)
 
I can not put GM commands 
 
However, I can do anything, but not his.
 
The Demo account is already at 10 (I did some research Google)
 
I tried the /whoami, /list, but to no avail.
 
 

I register, I start the game to create a player, then I quit the game, and I rename the 0 to 10.
 
Here is a picture ....
 

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Thx help