Can someone help with my BillboardGui Overhead Issue?

I'm stuck on why the TextLabel isn't appearing over my head, I want it so when I click on the TextButton a Text Label appears above his head indicating what he is in the game. I currently have this in a script Under StarterGui as the whole gui system is built under a script. So the textButton gets created meaning this script should work but I don't know what is causing it to fail.

local vPlayer = game.Players.LocalPlayer

script.Parent.ClassPicker.Fighter.Fighter.MouseButton1Down:connect(function(p)

if p then
local bGui = Instance.new("BillboardGui")
bGui.Parent = vPlayer.Character.Head
bGui.Name = "ClassName"
local cL = Instance.new("TextLabel")
cL.Parent = bGui
cL.Position = UDim2.new(-0.125,0,-1.1,0)
cL.Size = UDim2.new(1.25,0,1.75,0)  
end 
end)