For some reason CommandHelper does not appear to be compatible with spigot. I can confirm that it is an issue with spigot because I loaded up bukkit with the same situation and it worked flawlessly... Here is the error log I got when starting up: http://pastebin.com/74iZpS3d I'm running the most recent version of CommandHelper, however I have tried this with previous, stable versions and the same error occurs. Any help? Anyone else running CommandHelper that has a version that works?