EmptyDynamix

So I wanted to give me and my friend a stick with knockback and I tried using "/give @p stick{Enchantments:[{id:knockback,lvl:5}]} 2" but the server completely denies it, despite working in my singleplayer world. If there is a plugin I can get to put enchants on it that would work fine too, I just want to have some fun with a knockback 5 stick.