[ubuntu] Getting Black screen with Cursor from liveCD

I am using a Maxwell DVD-R as a LiveCD for Ubuntu 12.10 64-bit. I have tried to boot it on my Late 2012 Macbook Pro by pressing 'c' on startup, but all I get is a black screen with a flashing underscore cursor.

Is the problem the DVD (do I need a CD?) or is it something else?

Thanks--zd9