Script doesn't make text and image dissapear for some reason ?

Hello, i wanted to make a scirpt, what it would do is make text and a image dissapear, but it does nothing, btw. the script is a LocalScript:

wait(5)
game.StarterGui.Warning.ImageButton.Visible = false
game.StarterGui.Warning.TextLabel.Visible = false

i don't know is it because there are other guis with name ImageButton and TextLabel that make this script not sure which image and text should it make invisible