Welcome to LQ!
the computer just laughs at me when I try to boot from the DvD.
Sorry, but "laughs at me" doesn't help
Did it play laugh.ogg ? (Joke)
We need to know exactly what it says, or does, or doesn't do, to help you to diagnose the problem.
Exact error messages, or careful explanation of what happened will help us to help you.
The previous posters are correct: Burn the .iso
file specially, there'll be something in your burning software (I do not know if you are using linux or windows-whatever to do this) that lets you select this.