My kit plugin doesn't work anymore. I need help.

1. Than he is not your friend
2. No, I'm not gay. If you are, thats totally ok, I'm not homophobic. I just don't like it when people are spamming the same stuff x times.
3. Do you offer anything for helping you out? No? -> begging
4. Have you thought about the possibility that the new version of the plugin isn't working because it is poisoned? (Because your "friend" also ddosed you and stuff). Have you tried using the old version of the plugin?

I replaced the old one with the new one.
And he didn't ddos me and my server until I sent the plugin to one of my friends. It's not poisened, the plugin isn't showing up on /plugins

You didn't keep a backup of the old one?
It can still be poisoned even if its not showing up on /plugins

I accidently clicked, remove and replace..... So, I don't have the old one.
Just, how do I fix it?

I can't help you out, because I'm not a coder, but you might get some help from @LordPankake
But you know. Money rules the world.

The kid who made the plugin keeps ddosing my server....
It's pissing me off.

Contact your ISP/server host and tell them about your problem, they will fix it. If you are hosting your server at home - Protip: Don't post your Skype username on the internet, people can resolve your IP and ddos you.
Why is he ddosing your server?

Because, I sent the plugin to my friend to fix it. And idk how he found out, and it pissed him off. because the person I sent the plugin to, owns a kit pvp server, and he thinks that he will take his code. and he got pissed, etc. and he started ddos'ing the server.

The plugin might be poisoned and it might be sending data like IP, CB version, plugins,...
As already said contact your ISP/server host to deal with him.

Well, The new one he sent, was before I sent it to my friend. So, he wasn't pissed at me last night.