You need to increase your Accesslevel in your database.
(Doing that like phantom says)
For adding [GM] to your name, you need to add that to one or all your characters, also inside the database, but in character_list.
Wright [GM] in front of your character name nad hit go, restart server and its done.
Remember, you cant see your name in Blue, only others can.
Every command has its own accesslevel.
Default for every player are 100, so setting a accesslevel to 99, makes all players able to use it.
Heres how to edit:
In your server directory, you have a Configfile namned Commands.config.
Open it up and Edit the commands you whant. (99 are for all players)