How to clone a part and have a script inside it run?

I have a mesh part inside of ReplicatedFirst with a simple script attached:

print("Hello world!")

while true do
    print("Hello world!")
    wait(1)
end

However, when I clone it into workspace, it doesn't run. I don't understand why. What am I doing wrong?

Edit:

I tried to set the script's Disabled property to True and then after I cloned the part, set it back to false, but it still didn't run:

This is the function I am using to spawn the meshPart

local function CreateNewPart(partToCreate, position)
    local copy = partToCreate:Clone()
    copy.CFrame = CFrame.new()
    copy.Anchored = true
    copy.CanCollide = true
    copy.Position = position
    copy.Orientation = Vector3.new(0,0,0)
    copy.Parent = platformsFolder
    copy.Script.Disabled = false
    print(copy.Script.Disabled)
    return copy 
end

The output from the print() is "false"