LocalScript to change hats on a model in workspace works fine in studio but not in-game?

The script works fine in studio but once I test it using servers nothing happens when the textbutton is clicked, I don't know what's wrong with it, could anyone take a quick look for me?

local player = script.Parent.Parent.Parent

Back = script.Parent.Previous
Next = script.Parent.Next
hatfolder = game:GetService("ReplicatedStorage").Hats
hair1 = hatfolder["LongHairHeadBand Black"]
hair2 = hatfolder["Katrina"]
hair3 = hatfolder["Tail"]
hair4 = hatfolder["Bun"]
hair5 = hatfolder["Ultra-Fabulous Hair"]
hair6 = hatfolder["BrownCharmerHair"]
hair7 = hatfolder["ShortSpiky"]
hair8 = hatfolder["Swoosh"]
hair9 = hatfolder["anima"]
hair10 = hatfolder["bdh"]
dummy = game.Workspace.P
local hair = 1

Back.MouseButton1Down:connect(function()
    if hair == 2 then
        dummy.Hair:destroy()
        hair1:clone()
        hair1:clone().Name = "Hair"
        hair1:clone().Parent = dummy
        dummy["LongHairHeadBand Black"].Name = "Hair"
        hair = 1
        print(hair)
end
end

Next.MouseButton1Down:connect(function()
    if hair == 1 then
        dummy.Hair:destroy()
        hair2:clone()
        hair2:clone().Parent = dummy
        dummy["Katrina"].Name = "Hair"
        hair = 2
        print(hair)
end
end)