Why won't setting an animation's priority to "Action" override the default holding animation?

So.......yup, the question is pretty much in the title, but i'ma g into more detail with this, cough cough, so yeah, i made it so when you activate a tool it makes your character do an Eating Animation, i set the priority of the Animation to Action which i heard would override the default Holding Animation, however, this doesn't appear to work for me, this feels especially weird since it seems to have worked for allot of other people, here's the code i used to set the priority and stuff

local AnimId = "http://www.roblox.com/asset/?id=03029036089"
local Animation = Instance.new("Animation")
Animation.AnimationId = AnimId
local LoadAnim = Humanoid:LoadAnimation(Animation)
LoadAnim.Priority = Enum.AnimationPriority.Action
wait(0.2)
LoadAnim:Play()

WHAT AM I DOING WRONG? :(