How do I make a DVD data disc and burn files to it? (DVD-R)

I have a few empty dvds and I want to copy some games over. But the computer does not recognise them as suitable discs and still asks for a proper DVD disc to write to. I also tried this with Nero express and it still doesn’t work? Anyone know what the problem is?

First-are you certain that the player/burner is a DVD burner. Second-What make and model? Finally tell us about the software you want to use-is it Nero, Roxio or something else?
My Software is Ashampoo Burning Studio. It will tell you what kind of drive (brand and model) you have. This is true for other programs. Our drives are all Sony and are clearly marked as to what they can do. Discs for me are Verbatim for both CD and DVD burning.