Has anyone managed to back up Deus Ex?

[Demon Bane]

I just got it today and attempted to copy it twice, with no success. I'm using the same 80 minute Princo media that I've had for a number of months now, yet I cannot make a good copy. The copy finishes properly, but when I try to read the CD I get an "no disc loaded" error. (Going in through a DOS prompt leads to a "CRC error" message.) I've also tried to make an image of the files on the CD with the same results. Is this some sort of new copy protection that I don't know about? Thanks for any help.