What does it mean?!

[ivana]

I have a problem! This messages makes me crazy: "Please insert the correct DVD-ROM,select ok and restart application" . What does it mean and what should I do to fix the problem? Help!
P.S. I tried to do something with the dvd-drive, but nothing happens

[JaoSming]

did you download the game from the net?

[ivana]

No,I didnt! I even dont know how to download from the net!
Can you help me?

[JaoSming]

when you put the DVD into the computer, does the autorun pop up? If you goto my computer can you see the NBALIVE07 in the DVD drive?