boopytheboop

So I've been trying to upload a world to my server for the past day and finally got all the files and such sorted out. I followed the steps recently posted on how to upload a world from the forums, I uploaded it into File Manager, unziped the file, and renamed the world level to the file I want to play. But now every time I try to start my server, it will begin starting but then stops. A message pops up saying an unknown error has occurred so I don't know what to do. I have also tried repairing my files but it hasn't worked. Pls help DD: