Solved Essentials Kits Issues (Kit improperly defined)

Hi! I'm having some problems with the Essentials built in kits system. I've never had this problem before in previous servers. When I try to use the kit, I get the error message "This kit is improperly defined. Please contact an administrator." So I checked the kit but I just can't find anything wrong with it. I've even tried using the official Bukkit enchantments, but to no avail. Here's my essentials configuration file: http://pastebin.com/NTbiJj9P the kit I'm having troubles with is Iron. Thanks for your help everyone.

I've changed the diamond sword's enchantment to DAMAGE_ALL:1 and it still doesn't work.

Problem resolved. Used the plugin KitAdder.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.