Animation in LocalScript not start. How to solve?

Hi, I've a problem with animations. I've created a LocalScript that if a RemoteEvent is invoked it will start an animation. This is the script:

repeat wait() until game:GetService("Players").LocalPlayer
local Player = script.Parent.Parent

game:GetService("ReplicatedStorage").StartAnimationEvent.OnClientEvent:Connect(function(AnimationName)
	local Humanoid = Player.Character:FindFirstChildOfClass("Humanoid")
	if Humanoid then
		local Animation = Humanoid:FindFirstChild(AnimationName)
		if Animation then
			local AnimationTrack = Humanoid:LoadAnimation(Animation)
			AnimationTrack:Play()
			AnimationTrack.Looped = true
			if AnimationTrack.IsPlaying then
				print("Is playing.")
			end
		end
	end
end)

However even if it is printed "Is playing.", which makes me understand that everything is ok the animation does not start.