The undelphix site seems to work for me.

nildo, we understand you're having some difficulties, but unless you tell us exactly what is going wrong, we can't help you.
this line: Surface.Draw is not working. Or it's working, but the layer surface does not get's to the main surface
That doesn't make a lot of sense. From the looks of it your code looks okay, but then, we're missing a lot of the whole picture. Perhaps you can tell what kind of error you're getting.