Question regarding billboard gui's ?

I am trying to add billboard gui's to player's heads. I copied the script out of another game I had and for some reason it no longer works, in the original game and in play solo the scripts work fine (they are both in server scripts) I added prints all through and they all print, the player/character are both defined correctly, what could be wrong?

function bg2(player12,cil)
	print("received")
	print(player12.Name)
	local character = player12.Character
	if cil == "cop" and character then
		print("try")
		bg = Instance.new("BillboardGui")
		bg.Parent = character.Head
		bg.Adornee = character.Head
		bg.Size = UDim2.new(1, 0, 1, 0)
		bg.StudsOffset = Vector3.new(0, 2, 0)
		frame = Instance.new("Frame")
		frame.Parent = bg
		frame.Size = UDim2.new(1, 0, 1, 0)
		frame.BackgroundTransparency = 1
		frame.BackgroundColor3 = Color3.new(1, 1, 1)
		text = Instance.new("TextLabel")
		print("try2")
		text.BackgroundTransparency = 1
		text.BorderSizePixel = 0
		text.Font = "ArialBold"
		text.TextStrokeTransparency = 0
		text.FontSize = "Size18"
		text.Parent = frame
		print("try3")
		text.Position = UDim2.new(0.25, 0, 0.25, 0)
		text.Size = UDim2.new(0.5, 0, 0.5, 0)
		text.Text = "Cop"
		text.TextColor3 = Color3.new(0,0,255)
	elseif cil == "jailer" and character then
		bg = Instance.new("BillboardGui")
		bg.Parent = character.Head
		bg.Adornee = character.Head
		bg.Size = UDim2.new(1, 0, 1, 0)
		bg.StudsOffset = Vector3.new(0, 2, 0)		 
		frame = Instance.new("Frame")
		frame.Parent = bg
		frame.Size = UDim2.new(1, 0, 1, 0)
		frame.BackgroundTransparency = 1
		frame.BackgroundColor3 = Color3.new(1, 1, 1)		 
		text = Instance.new("TextLabel")
		text.BackgroundTransparency = 1
		text.BorderSizePixel = 0
		text.Font = "ArialBold"
		text.TextStrokeTransparency = 0
		text.FontSize = "Size18"
		text.Parent = frame
		text.Position = UDim2.new(0.25, 0, 0.25, 0)
		text.Size = UDim2.new(0.5, 0, 0.5, 0)
		text.Text = "Jailer"
		text.TextColor3 = Color3.new(255,0,0)
	end	
end