Script works in studio test mode but not in game?

The title explains it all, when I'm in ROBLOX Studio and click test, this script works fine, but when I activate the game and join in, it does nothing.

Here's what it's supposed to do- https://www.dropbox.com/s/utudgp9i35bkmzu/robloxapp-20160403-1838544.wmv?dl=0

script.Parent.BG.Visible = true
script.Parent.Frame.Visible = true
script.Parent.BG.Size = UDim2.new(2,0,2,0) 
script.Parent.BG.Position = UDim2.new(-1, 0, -1 , 0)
wait(1)
script.Parent.Frame.TextBox.Position = UDim2.new(0, -500, 0, 250)
script.Parent.Frame.TextBox:TweenPosition(UDim2.new(0, 0, 0, 250), "Out", "Quad", 1.5)
wait(.6)
script.Parent.Frame.TextBox2.Position = UDim2.new(0, 1500, 0, 400)
script.Parent.Frame.TextBox2:TweenPosition(UDim2.new(0, 0, 0, 400), "Out", "Quad", 2)
wait(3)
script.Parent.Frame.TextBox.Position = UDim2.new(0, 0, 0, 250)
script.Parent.Frame.TextBox:TweenPosition(UDim2.new(0, -500, 0, 250), "Out", "Quad", 1.5)
script.Parent.Frame.TextBox2.Position = UDim2.new(0, 0, 0, 400)
script.Parent.Frame.TextBox2:TweenPosition(UDim2.new(0, 0, 0, 1000), "Out", "Quad", 1.5)
wait(.01)
script.Parent.BG.ImageTransparency = .001
wait(.01)
script.Parent.BG.ImageTransparency = .002
wait(.01)
script.Parent.BG.ImageTransparency = .003
wait(.01)
script.Parent.BG.ImageTransparency = .004
wait(.01)
script.Parent.BG.ImageTransparency = .005
wait(.01)
script.Parent.BG.ImageTransparency = .006
wait(.01)
script.Parent.BG.ImageTransparency = .007
wait(.01)
script.Parent.BG.ImageTransparency = .008
wait(.01)
script.Parent.BG.ImageTransparency = .009
wait(.01)
script.Parent.BG.ImageTransparency = .01
wait(.01)
script.Parent.BG.ImageTransparency = .02
wait(.01)
script.Parent.BG.ImageTransparency = .03
wait(.01)
script.Parent.BG.ImageTransparency = .04
wait(.01)
script.Parent.BG.ImageTransparency = .05
wait(.01)
script.Parent.BG.ImageTransparency = .06
wait(.01)
script.Parent.BG.ImageTransparency = .07
wait(.01)
script.Parent.BG.ImageTransparency = .08
wait(.01)
script.Parent.BG.ImageTransparency = .09
wait(.01)
script.Parent.BG.ImageTransparency = .1
wait(.01)
script.Parent.BG.ImageTransparency = .15
wait(.01)
script.Parent.BG.ImageTransparency = .2
wait(.01)
script.Parent.BG.ImageTransparency = .25
wait(.01)
script.Parent.BG.ImageTransparency = .3
wait(.01)
script.Parent.BG.ImageTransparency = .35
wait(.01)
script.Parent.BG.ImageTransparency = .4
wait(.01)
script.Parent.BG.ImageTransparency = .45
wait(.01)
script.Parent.BG.ImageTransparency = .5
wait(.01)
script.Parent.BG.ImageTransparency = .6
wait(.01)
script.Parent.BG.ImageTransparency = .7
wait(.01)
script.Parent.BG.ImageTransparency = .8
wait(.01)
script.Parent.BG.ImageTransparency = .9
wait(.01)
script.Parent.BG.ImageTransparency = 1
wait(.01)
game.StarterGui.BG:Destroy()
game.StarterGui.Frame:Destroy()