[SOLVED] Permanently shutting down a server/Can't connect to server

I set up an Origins server, but I'm unable to connect to it, and every time it just says 'connection lost' the second I join the server and kicks me out. I'd like to either shut down my server for good and try again on another one, or figure out a fix for this. And by 'shut down', I mean deleting the server in a way that it removes it from the server list, not just deleting the world.

If anyone was wondering, no, the Dyn IP doesn't work.

Quote from Roman

That error is typically shown when the installed mods on your computer don't match the mods on the server.

Also the versions of the mod must be the same!

Thanks, that was the problem!