why does this works in SOLO play but not in the actual game?!?!

Ok, so this script is not actually mine, it is builderman's, but i edited it, and made my own attachments to it, but for some reason it only works in SOLO play in studio, Why is that!!! here is the script

--Basics of this script was taken from Builderman's ROBLOXtablet --yogipanda123

local gui = script.Parent.ScreenGUI:Clone()

function Equip()
	gui.Parent = game.Players.LocalPlayer.PlayerGui
end

function Unequip()
	gui.Parent = nil
end

script.Parent.Equipped:connect(Equip)
script.Parent.Unequipped:connect(Unequip)

thanks to whoever answers this!

One up DawnHorizon who answered correctly (I'm basing this edited comment after reading his theory which works :D).

If you have many scripts like me, just make a script that waits 1/2 seconds then scans a list of scripts and enables them. Previously disable all of them before uploading. Here is a code snippet of what I did:

wait(.5) -- Allows player to load

player = game.Players.LocalPlayer --Local Player
gui = player.PlayerGui
scriptsToLoad = {gui.Blah, gui.MoreBlah, gui.Sweet} -- List of scripts (this form gives the object)

for num, obj in pairs(scriptsToLoad) do -- Scans the entire list of scripts we added earlier
	obj.Disabled = true -- This disables the script, I would recommend just disabling them in the game 					not using this script.
	wait(0.01) -- Waits a little.
	obj.Disabled = false -- This enables the script.
end -- Done

This should help if you have many scripts you want to fix :D