Thank you. I've been waiting for that information.
There are two fairly distinct parts to burning a disc. First is the planning, assembling, sorting, rendering, and preparing your data, then making an image. The other is actually burning it to plastic. Usually the first part is the trickiest since there are so many things the software has to do, but in your case you've successfully done that and produced an ISO image. The error has happened when the machine is trying to burn that ISO image to plastic disc, so that's where we need to look.
Unfortunately that error message is just telling us there was a burn error, and it isn't telling us why or how. We still don't know if it's the burning software, or something wrong with the drive. Here you're going to need some blank discs, or a rewriteable one.
-first: Can you burn that ISO to disc with the Roxio module Burn Image to Disc? If not, what happens?
-if not: Can you burn the ISO to disc with other software such as ImgBurn (written by Lightning UK, so he might be a Brit)
-if not: Can you burn anything to disc with your burner drive?