Help with Custom command

I am trying to add a command
Should be like this:
/troll.rocketman <player>
I add it to your config like this: 
  "5. custom command 1 : command": "/troll.rocketman {playername}",
or
  "5th Custom Command 1 : Command": "troll.rocketman {playername}",

but neither works. Can you tell me what I'm doing wrong? Because in normal chat, the command works.

Custom  commands are console commands . So if the command can run in console .(server console) it should work. So asume you dont own payback . Seeing you have a command similiar as payback's rocketman

Thanks for the quick answer. I use this plugin. 

Here is my config with which I am testing it.

{
  "1. Sign Picture URL": "www.noobhub.co.za/dont.png",
  "10. Custom Command 2 : Message": "Just got a Rank",
  "11. Custom Command 3 : Command": "giverank {playerid}",
  "12. Custom Command 4 : Message": "Just got a Rank",
  "13. Broadcast Font Size [18 default]": 18,
  "14. Send Discord embeds on punishments": false,
  "15. Discord WebHook URL": "https://support.discord.com/hc/en-us/articles/228383668-Intro-to-Webhooks",
  "2. Timed C4 (false will be instant explosion": true,
  "3. Use Random location for swim location": true,
  "4. Broadcast Button Action to Server": true,
  "5. Custom Command 1 : Command": "troll.rocketman {playername}",
  "6. Custom Command 1 : Message": "troll fly",
  "7. Cooldown Time on Button Press": 0,
  "8. Use Payback Plugin Punishments": false,
  "9. Custom Command 2 : Command": "giverank {playerid}",
  "Bear": 0,
  "C4": 0,
  "Cactus": 0,
  "Chickens": 0,
  "Custom Command 1": 2,
  "Custom Command 2": 0,
  "Custom Command 3": 0,
  "ExplosiveDiarrhea": 0,
  "Fall": 0,
  "FireBall": 0,
  "GunTrap": 0,
  "Landmine": 0,
  "Payback:Naked": 0,
  "Payback:Rocketman": 0,
  "Payback:Shark": 0,
  "Payback:Shocker": 0,
  "PVELord": 0,
  "Radiation": 0,
  "Scarecrow": 0,
  "Scientist": 0,
  "Scrapheli": 0,
  "Shredder": 0,
  "Slap": 0,
  "Swim": 0
}

try to use playerid instead    .     " troll.rocketman {playerid}"

Thank you it works

glad to help ... im buzy rewriting config .. so hopefully tomorrow  ill update a more readable config with 10 custom commands

Changed Status from Pending to Closed