Animation (again)

I've finally smoothed out all the errors in my script to find that this still doesn't work! Can anyone help me?

local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/asset/?id=148381514"
 
game.Players.PlayerAdded:connect(function(player)
  player.Chatted:connect(function(msg)
local msg = msg:lower()
if msg == "/e flap" then
local animTrack = player.Character.Humanoid:LoadAnimation(animation)
animTrack:Play()
end
end)
end)