Solved Need Help with Scoreboard

I need help with my scoreboard... I want to make a little Rank Plugin like Owner VIP ... but when i type th command i get an error called unhandled execption..
this is my command class.. registert the command in the plugin.yml and in my Main..
This is my code:
http://hastebin.com/ozebimacod.coffee
This is the error:
http://hastebin.com/dudafudofe.rb


I hope you can help me

~Kiwanga

 

Caused by: java.lang.IllegalArgumentException: Team name 'Vip' is already in use

You already made the Team VIP, you just need to find the team rather than registering it every time the command is run

 

http://hastebin.com/jaxalabuve.avrasm
This is my new code
I dont get the error again thank you for that
But it stil doesnt work... Can you help me again?

 

@Kiwanga
http://hastebin.com/lacemikoji.coffee
not tested! i hope this is working for you

 

What @Mexicaantjes put should work.

 

It still doesnt work xD if i klick tab there is no prefix an im not in the team ...

Ok xD now it works

EDIT by Moderator: merged posts, please use the edit button instead of double posting.