Bukkit

What is the issue?
unloading plugin

Please provide any additional information below.

this plugin dose not seem to be working i am using spigpot 1.7.10 wich others use and say it works when i do commands like /train and /cart it dose not say unknown command but dose not do anything ether (i WAS using bukkitcommonlib) i got a 404 erorr when trying to get server 1.7.10 R0.1 and another error with the other one when starting up the server: "no main manifest attribute, in bukkit-1.7.9-R0.1.jar"