Why does cloning a model into workspace that has a script inside it not fire it?

I have a script inside a model, and whenever I clone it into workspace, the script does not get active. What is the cause?

Object being cloned into workspace:

while true do
    script.Parent.Velocity = script.Parent.CFrame.lookVector*10
    wait()
end

Script cloning it into workspace:

wait(2)

lol = game.ReplicatedStorage.Conveyor:Clone()
lol.Parent = workspace