Why does my animation not stop when a player unequipped a tool?

When I load the game, the animations play and work properly.

But when I try to stop the animaitions it doesn't work.

local walkanim = script.Parent.Parent.Humanoid:LoadAnimation(script.Walk)
local idleanim = script.Parent.Parent.Humanoid:LoadAnimation(script.Idle)

script.Parent.Equipped:Connect(function()

	local mouse = game.Players.LocalPlayer:GetMouse()
	local player = game.Players.LocalPlayer
	local mouse = game.Players.LocalPlayer:GetMouse()
	idleanim:Play()
	
	mouse.KeyDown:connect(function(key)
		if key ==  "w" then
			walkanim:Play()
			idleanim:Stop()
		end
	end)
	mouse.KeyUp:connect(function(key2)
		if key2 == "w" then
			walkanim:Stop()
			idleanim:Play()
		end
	end)
end)
script.Parent.Unequipped:Connect(function()
	walkanim:Stop()
	idleanim:Stop()
end)

Any help would be nice. Thanks!