Does your Light Scribe CD already have a graphic image printed on the CD?
If so, that might be preventing the distribution from booting or be visable to you.
-::-I generally use CD-R's or DVD + R to burn my disto's on.-::-
Try putting the CD in your drive and shut down your computer.
Re-start your computer and the Live Zorin CD should start to boot up Zorin for you.
If your computer doesn't boot up the Live CD of Zorin it could be because of your boot order in your BIOS.
In your BIOS make CDROM the first choice, save and exit BIOS.
Upon restarting the CD of Zorin should start booting up for you.