I Have trouble with creating a new button. It shows only the labelname but not the chosen default.png and over.png. I did it exactly as in the video on corona website… 
this is my code:
– Neuer Button
local widget = require (“widget”)
– Button Funktion
local function handleButtonEvent (event)
local phase = event.phase
if “ended” == phase then
print ( “you pressed and released a Button”)
end
end
– Button Erstellen
local StartButton = widget.newButton
{
left = 50,
top = 400,
width = 230,
height = 100,
defaultfile = “ButtonD.png”,
overfile = “ButtonO.png”,
label = “los gehts”,
onEvent = handleButtonEvent,
}