Animation Works In Roblox Studio But Not The Actual Game?

I Don't Know Why But The Animation Works In Roblox Studio But Not On The Actual Game

Here Is The LOCAL Script:

local tool = script.Parent
local anim = Instance.new("Animation")
anim.AnimationId = "http://www.roblox.com/Asset?ID=5443808975" --Animation ID
anim.Parent = script
local track
tool.Activated:Connect(function()
	if script.Bites.Value == 0 then
		script.Parent:Destroy()
	else
		script.Bites.Value = script.Bites.Value - 1
   		track = script.Parent.Parent.Humanoid:LoadAnimation(anim)
    	track.Priority = Enum.AnimationPriority.Action
    	track.Looped = false
		track:Play()
	end
end)
tool.Unequipped:Connect(function()
    if track then
        track:Stop()
    end
end)