Sorry for the delay - ISP problems last night.
The equipment wouldn't recognise disks at all and it seemed to have been caused by the copy - I got it all going rather easily though by simply unplugging the players for long enough to let them lose any stored settings, reverting back to factory default.
This seems to be in line with Macromedia's blurb (and I assume other similar companies) that by causing frustration on the part of users trying to copy media they will steer a percentage away from copying toward purchasing the originals. What about the people who want to keep their originals in pristine condition though?