Why is this script not completing its function?

So this script turns a textlabel visible when the mouse is over a model with a certain stringvalue inside of it. Here's the script:

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local red = player.PlayerGui:WaitForChild("WeaponHUD")
local TextLabel = red:WaitForChild("TextLabel")

function hov()
	if mouse.Target.Parent:FindFirstChild("ShowGui") then
		red.TextLabel.Visible = true
	elseif mouse.Target.Parent:FindFirstChild("ShowGui") then
		red.TextLabel.Visible = false
	end
end

mouse.Move:Connect(hov)

As you can see, I also tried to make it invisible once the mouse is away from that certain model. But I don't see why. Someone please explain.