Why doesn't my code work outside of build mode?

Here is my code.

local enabled = true
Player = script.Parent.Parent
character = Player.Character
mouse = Player:GetMouse()

function onKeyDown(key)
key = key:lower()
if key == "t" then
game:GetService("Chat"):Chat(Player.Character.Head, "Focus the mind, reflect upon yourself, and determine the goal.")
local Left_Arm = Instance.new ("Part")
local Right_Arm = Instance.new("Part")
local Core = Instance.new("Part")
local Left_Leg = Instance.new("Part")
local Right_Leg = Instance.new("Part")
Left_Arm.BrickColor = BrickColor.new("White")
Left_Arm.Size = Vector3.new(1, 2, 1)
Left_Arm.TopSurface = "Smooth"
Left_Arm.BottomSurface = "Smooth"
Left_Arm.Transparency = 0.7
Left_Arm.CanCollide = false
Left_Arm.CFrame = Player.Character["Left Arm"].CFrame *CFrame.new(0, 0, 0)
Left_Arm.Parent = workspace
Right_Arm.BrickColor = BrickColor.new("White")
Right_Arm.Size = Vector3.new(1, 2, 1)
Right_Arm.TopSurface = "Smooth"
Right_Arm.BottomSurface = "Smooth"
Right_Arm.Transparency = 0.7
Right_Arm.CanCollide = false
Right_Arm.CFrame = Player.Character["Right Arm"].CFrame *CFrame.new(0, 0, 0)
Right_Arm.Parent = workspace
Core.BrickColor = BrickColor.new("White")
Core.Size = Vector3.new(2, 1.9, 1)
Core.TopSurface = "Smooth"
Core.BottomSurface = "Smooth"
Core.Transparency = 0.7
Core.CanCollide = false
Core.CFrame = Player.Character["Torso"].CFrame *CFrame.new(0, 0, 0)
Core.Parent = workspace
Left_Leg.BrickColor = BrickColor.new ("White")
Left_Leg.Size = Vector3.new(1, 2, 1)
Left_Leg.TopSurface = "Smooth"
Left_Leg.BottomSurface = "Smooth"
Left_Leg.Transparency = 0.7
Left_Leg.CanCollide = false
Left_Leg.CFrame = Player.Character["Left Leg"].CFrame *CFrame.new(0, 0, 0)
Left_Leg.Parent = workspace
Right_Leg.BrickColor = BrickColor.new("White")
Right_Leg.Size = Vector3.new(1, 2, 1)
Right_Leg.TopSurface = "Smooth"
Right_Leg.BottomSurface = "Smooth"
Right_Leg.Transparency = 0.7
Right_Leg.CanCollide = false
Right_Leg.CFrame = Player.Character["Right Leg"].CFrame *CFrame.new(0, 0, 0)
Right_Leg.Parent = workspace

local Weld = Instance.new("Weld")
Weld.Part0 = Left_Arm
--Weld.C0 = Left_Arm.CFrame:inverse()
Weld.Part1 = character:FindFirstChild("Left Arm")
Weld.Parent = character 

local Weld2 = Instance.new("Weld")
Weld2.Part0 = Right_Arm
--Weld2.C0 = Right_Arm.CFrame:inverse()
Weld2.Part1 = character:FindFirstChild("Right Arm")
Weld2.Parent = character 

local Weld3 = Instance.new("Weld")
Weld3.Part0 = Core
--Weld3.C0 = Core.CFrame:inverse()
Weld3.Part1 = character:FindFirstChild("Torso")
Weld3.Parent = character

local Weld4 = Instance.new("Weld")
Weld4.Part0 = Left_Leg
--Weld4.C0 = Left_Leg.CFrame:inverse()
Weld4.Part1 = character:FindFirstChild("Left Leg")
Weld4.Parent = character

local Weld5 = Instance.new("Weld")
Weld5.Part0 = Right_Leg
--Weld5.C0 = Right_Leg.CFrame:inverse()
Weld5.Part1 = character:FindFirstChild("Right Leg")
Weld5.Parent = character    
end
end

mouse.KeyDown:connect(onKeyDown)

Instead of the blocks connecting to the player's body like in build mode. Can anyone help?