Why is my textlabel not appearing when a mouse hovers over the brick where its supposed to appear?

I am having trouble to getting my script which makes a textlabel appear when a person's mouse hovers over the brick that I assigned to make the textlabel appear. this script is in Startergui and is a local script. Any suggestions are appreciated. No errors appear

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local SHOWGUI = workspace.Mannequin.SHOWGUI
local ScreenGui = script.Parent.ScreenGui
local TextLabel = ScreenGui.TextLabel
game:GetService('RunService').RenderStepped:Connect(function()
	local X = Mouse.X
	local Y = Mouse.Y
	if Mouse.Target and Mouse.Target.Name == 'SHOWGUI' then
		TextLabel.Visible = true
		TextLabel.Text = "Click to try on Shirt"
TextLabel.Position = UDim2.new(0,X,0,Y)
	else
		TextLabel.Visible = false
end
end)