TweenSize not working, help?

I'm making a nice, short, basic intro gui and I want to employ TweenSize. I have made many intro guis before, but theyve all used TweenPosition. This is my first time using size and I already have an issue. When I run it, the frames don't smoothly get bigger, as they all start with a size of {0, 0, 0, 0}. What it looks like on my screen, is that I may as well have altered transparency from 1 to 0,a s there is no animation, it suddenly appears. Any help would be great. Thanks!

wait(1)

--// Variable Storage

local lineOne = script.Parent.StepOne
local lineTwoA = script.Parent.StepTwoA
local lineTwoB = script.Parent.StepTwoB
local lineThreeA = script.Parent.StepThreeA
local lineThreeB = script.Parent.StepThreeB
local text1 = script.Parent.Text1
local text2 = script.Parent.Text2
local text3 = script.Parent.Text3
local logo  = script.Parent.Logo

--// Logic

lineOne:TweenSize(UDim2.new(0.15, 0, 0, 1), 'Out', 'Quint', 1)
lineTwoA:TweenSize(UDim2.new(0, 1, 0.3, 0), 'Out', 'Quint', 1)
lineTwoB:TweenSize(UDim2.new(0, 1, 0.3, 0), 'Out', 'Quint', 1)
lineThreeA:TweenSize(UDim2.new(1, 0, 0, 1), 'Out', 'Quint', 1)
lineThreeB:TweenSize(UDim2.new(1, 0, 0, 1), 'Out', 'Quint', 1)