Button Not Appearing

I have been trying to make a button, and the code seems correct, but the button does not appear. Everything on the iPhone stimulator looks normal (except without a button), and the terminal output says everything is okay. Here is what I have for the button:

local ui = require(“ui”)

local buttonHandler = function(event)
end

local playbutton = ui.newButton{
default = “buttonPurple.png”,
over = “buttonPurpleOver.png”,
onEvent = buttonHandler,
text = “Play”,
id = “play”,
size = 20,
emboss = true
}

playbutton.x = display.contentWidth/2
playbutton.y = display.contentHeight/1.5

What is wrong with this? [import]uid: 30901 topic_id: 5736 reply_id: 305736[/import]

Your code worked for me. Do you have the ui.lua file in your project folder? [import]uid: 25480 topic_id: 5736 reply_id: 19834[/import]