I don't know, why it doesn't works.
background = guiCreateStaticImage(10,10,200,200,"bg.png", false)
-- create the log in window and its components
-- enable the players cursor (so they can select and click on the components)
-- set the input focus onto the GUI, allowing players (for example) to press 'T' without the chatbox opening
The picture doesn't loaded.
There are only the login GUI