RopeConstraints not showing physical rope, just imaginary?

I have been trying to use the new RopeConstraint class to create Balloons but there is no visible rope between the parts. Here is what I have so far:

function Activated()
    -- Create A New Balloon
    local NewBaloon = Instance.new("Part")
    NewBaloon.Name = "Balloon"
    NewBaloon.Shape = "Ball"
    NewBaloon.BrickColor = BrickColor.Random()
    NewBaloon.Position = script.Parent.Handle.Position + Vector3.new(0,5,0)
    NewBaloon.Size = Vector3.new(2,2,2)
    NewBaloon.CanCollide = true
    NewBaloon.BottomSurface = "Smooth"
    NewBaloon.TopSurface = "Smooth"
    NewBaloon.Material = "SmoothPlastic"
    NewBaloon.Parent = script.Parent.Balloons
    -- Create An Attachment For The Baloon
    local NewBaloonAttachment = Instance.new("Attachment")
    NewBaloonAttachment.Parent = NewBalloon
    -- Create An Attachment For The Player
    local NewPlayerAttachment = Instance.new("Attachment")
    NewPlayerAttachment.Parent = script.Parent.Handle
    -- Create A RopeConstraint For The Balloon
    local NewBaloonRopeConstraint = Instance.new("RopeConstraint")
    NewBaloonRopeConstraint.Attachment0 = NewPlayerAttachment
    NewBaloonRopeConstraint.Attachment1 = NewBaloonAttachment
    NewBaloonRopeConstraint.Parent = script.Parent.Handle
    local Helium = script.Parent.BodyForce:Clone()
    Helium.Parent = NewBalloon
end

script.Parent.Activated:connect(Activated)

Any help as to why the rope isn't showing will be greatly appreciated!