as Icruise said, you've got the wrong media. go out and buy some DVD-R/RW media, then you're all set. you don't even really need toast, you can burn from the desktop. if you put a blank disc in (running X.2), it may ask you what you want to do with the blank DVD, or if you changed the CD/DVD sys prefs, it will do whatever that says. anyway, it will put the DVD-R on your desktop, and you can just drag stuff to it, then burn it.
although, for data burning, i still end up using toast because it's faster.
tr