Button GUI On Part Not Working on Mobile [Repost]

Hello,
I have a GUI that is adorneed to a part that allows you to purchase the building when you click it. Everything works just fine when I test it on computer, but when I switch to mobile to test it, the button does not activate the script when I press it. Any reason why?

Images:

Part with GUI ("sign")

GUI Properties/Location including children

Click Script
function Click(mouse)
-- code
end

script.Parent.MouseButton1Down:connect(Click)

Thanks in advanced.

Try this instead

function Click(mouse)
-- code
end

script.Parent.MouseButton1Click:Connect(Click)