Why isn't it working?

Player = script.Parent.Parent.Parent
Tool = script.Parent
c = Player.Character
mouse = Player:GetMouse()
function onMouseButton1Down(mouse)
    x = Instance.new("Part")
    x.TopSurface = "Smooth"
    x.BottomSurface = "Smooth"
    x.Size = Vector3.new(1, 1.95, 1)
    x.BrickColor = BrickColor.new("Bright blue")
    x.Transparency = 0.5
    x.Reflectance = 0.2
    x.Parent = c
    game.Debris:AddItem(x, 30)
    w1 = Instance.new("Weld", c)
    w1.Part0 = w1.Parent["Right Arm"]
    w1.Part1 = x
    w1.C1 = CFrame.fromEulerAnglesXYZ(0, 0, 0) *CFrame.new(0, 0, 0)
    y = Instance.new("Part")
    y.TopSurface = "Smooth"
    y.BottomSurface = "Smooth"
    y.Size = Vector3.new(1, 1.95, 1)
    y.BrickColor = BrickColor.new("Bright blue")        
    y.Transparency = 0.5
    y.Reflectance = 0.2
    y.Parent = c
    game.Debris:AddItem(y, 30)
    w2 = Instance.new("Weld", c)
    w2.Part0 = w2.Parent["Left Arm"]
    w2.Part1 = y
    w2.C1 = CFrame.fromEulerAnglesXYZ(0, 0, 0) *CFrame.new(0, 0, 0)
    z = Instance.new("Part")
    z.TopSurface = "Smooth"
    z.BottomSurface = "Smooth"
    z.Size = Vector3.new(2, 1.95, 1)
    z.BrickColor = BrickColor.new("Bright blue")    
    z.Transparency = 0.5
    z.Reflectance = 0.2
    z.Parent = c
    game.Debris:AddItem(z, 30)
    w3 = Instance.new("Weld", c)
    w3.Part0 = w3.Parent["Torso"]
    w3.Part1 = z
    w3.C1 = CFrame.fromEulerAnglesXYZ(0, 0, 0) *CFrame.new(0, 0, 0)
    a = Instance.new("Part")
    a.TopSurface = "Smooth"
    a.BottomSurface = "Smooth"
    a.Size = Vector3.new(1, 2, 1)
    a.BrickColor = BrickColor.new("Bright blue")
    a.Transparency = 0.5
    a.Reflectance = 0.2
    a.Parent = c
    game.Debris:AddItem(a, 30)
    w4 = Instance.new("Weld", c)
    w4.Part0 = w4.Parent["Left Leg"]
    w4.Part1 = a
    w4.C1 = CFrame.fromEulerAnglesXYZ(0, 0, 0) *CFrame.new(0, 0, 0)
    b = Instance.new("Part")    
    b.TopSurface = "Smooth"
    b.BottomSurface = "Smooth"
    b.Size = Vector3.new(1, 2, 1)
    b.BrickColor = BrickColor.new("Bright blue")
    b.Transparency = 0.5
    b.Reflectance = 0.2
    b.Parent = c
    game.Debris:AddItem(b, 30)
    w5 = Instance.new("Weld", c)
    w5.Part0 = w5.Parent["Right Leg"]
    w5.Part1 = b
    w5.C1 = CFrame.fromEulerAnglesXYZ(0, 0, 0) *CFrame.new(0, 0, 0)
    d = Instance.new("Part")
    d.TopSurface = "Smooth"
    d.BottomSurface = "Smooth"
    d.Size = Vector3.new(-1, -1, 0.2)
    d.BrickColor = BrickColor.new("Bright blue")
    d.Transparency = 0.5
    d.Reflectance = 0.2
    d.Parent = c
    w6 = Instance.new("Weld", c)
    w6.Part0 = w6.Parent["Torso"]
    w6.Part1 = d
    w6.C1 = CFrame.fromEulerAnglesXYZ(-1.6, 0, 0) *CFrame.new(0, 1, -1)
    game.Debris:AddItem(d, 30)
    e = Instance.new("Part")
    e.TopSurface = "Smooth"
    e.BottomSurface = "Smooth"
    e.Size = Vector3.new(2, 1, 1)
    e.BrickColor = BrickColor.new("Bright blue")    
    e.Transparency = 0.7
    e.Reflectance = 0.2
    e.Parent = c
    e.Shape = "Ball"
    f = Instance.new("SpecialMesh")
    f.Parent = e
    f.MeshType = "Head"
    f.Scale = Vector3.new(0, 0, 0)
    w7 = Instance.new("Weld", c)
    w7.Part0 = w7.Parent["Head"]
    w7.Part1 = e
    w7.C1 = CFrame.fromEulerAnglesXYZ(0, 0, 0) *CFrame.new(0, 0, 0)
    game.Debris:AddItem(e, 30)
end

function onSelected(mouse)
    mouse.Button1Down:connect(function() onMouseButton1Down(mouse) end)
end

Tool.Selected:connect(onSelected)

So, this is a Script, not a Local Script, which is in a HopperBin. The script works in solo mode but, when I'm joining the game it isn't working.I already tried making this script in a local script, didn't work.Any suggestions?