Well, I think that unless you've been trying to play your back-up copy from a writer without an atip hiding utility, you're copy is bad.
If you are trying to play from a writer, you must enable CloneCD's hide cdr media from the system tray (or alcohol's Ignore media type) for the copy to work (not necessary if you want to run the back-up copy from an ordinary cd/dvd rom).
If that isn't your problem, follow the tutorial and let us know how you get on. Try first with a cdrw to avoid coasters.
If then you still can't get your copy to work, let us know a bit about your system and, in particular, what writers and other reading devices you have.