My remoteevent to open a shop isn't working. How do I fix?

Basically when I click a button on a GUI it opens up another screengui. I'm using remotefunctions to enable the GUI but it isn't working.

Here is the code in my button:

script.Parent.MouseButton1Click:Connect(function()
    game.ReplicatedStorage.OpenShop:FireServer()
end)

Here is my code in the other GUI (the one I want to be enabled):

game.ReplicatedStorage.OpenShop.OnServerEvent:Connect(function()

    script.Parent.Enabled = true
end)

They're both in local scripts.

Here's the code I had before:

script.Parent.MouseButton1Click:Connect(function()
    script.Parent.Parent.Parent.ShopGUI.Enabled = true
end)