Lightscribe technology is cool, but almost noone uses it. Actually it can be hard also to find writable disks, at least in Italy.
I think this is the reason why having this technology working in ubuntu 64-bit can be a mess. You may find some discussions about the installation of the necessary software, but it seems that there isn't a "widely working" solution, so let's add another "worked for me" solution.
Install the ia32-libs
This package contains runtime libraries for the ia32/i386 architecture, configured for use on an ...