[KillerMoney does not work!]

I got KillerMoney for my server, then when I went and played the plugin didn't work! The only command that works is /km help

[How do you hide nametags]

/team modify [TEAMNAME] nametagVisibility never
Then when you want the nametags,
/team modify [TEAMNAME] nametagVisibility always

[Cant do @p or @e or @a or even @r.]

marsh my server had command blocks on.
igalaxy your answer worked!

[Cant do @p or @e or @a or even @r.]

I got my minehut server ready with plugins, I went on it to play and it worked great! But when I wanted to make a button to teleport someone to an arena, I couldn't do it because
I couldn't put the @p command in the command block!