Is there is any way to fix this problem?

So I wrote a code, and I tested it.

script.Parent.Frame.TextButton.MouseButton1Click:connect(function()
	if script.Parent.Frame.TextLabel.Text == "Hello! I'm mine248 and I'll be teaching you how to operate this train." then
		script.Parent.Frame.TextLabel.Text = "Press the up key or W to go forwards."
	elseif script.Parent.Frame.TextLabel.Text == "Press the up key or W key to go forwards." then
		script.Parent.Frame.TextLabel.Text = "Press the down key or S key to go forwards."
	elseif script.Parent.Frame.TextLabel.Text == "Press the down key or S key to go forwards." then
		script.Parent.Frame.TextLabel.Text = "Go open the door, on the side the platform is at (a big peice of block)."
	elseif script.Parent.Frame.TextLabel.Text == "Go open the door, on the side the platform is at (a big peice of block)." then
		script.Parent.Frame.TextLabel.Text = "Then wait until the timer counts to 1."
	end
end)

I t would work from lines 1-3, then fail on the other. Is there a error that did it?