Script works only when running the place in roblox studio, doesnt work when playing ?

Basically I have a script that makes a model go down:

X=script.Parent

while true do
wait()
for i= 1, 50 do
X:TranslateBy(Vector3.new(0, -0.4, 0))
wait()
end
end

and a script that stops the move script after 9 secconds

wait(9.5)
script.Parent.scriptmovelol.Disabled = true

I keep the scripts disabled, When I click run in roblox studio, I enable them and it works as it should. When I click play I enable the scripts but they do not work, the model doesn't move it moves only when I play it with the scripts already enabled