I tried to make a backup of dogz 5 and catz 5, but the games will not start. they come with an "illegal action" error.
This is typical of a failed back-up copy with sd 2.8.
Your writer (which is a re-badged Lite-on Ltr-24102B) is not capable of making a good back-up of sd 2.8 protected cds with CloneCD that will work (even from your Dvd-rom) without hide cdr media being enabled from the tray.
If you enable hide cdr media, your copy will probably work, at least from its installation drive (as the game may well be hot-wired to run only from that drive). However, if you get the "illegal action" error you must re-boot your system before trying again as even the original won't run after that error comes up until after a re-boot.
If you want a back-up copy that will run from your dvd-rom without the need for the emulation provided by ccd's hide cdr media, try either alcohol using safedisc (not safedisc 2/3) datatype settings or make an image of the cds with either discdump or clonecd (with cue) and burn the image with fireburner (using either dao16 or dao96).
Some writers of your model (or the Lite-on equivalent) can make good copies of safedisc 2.8 protected cds using those methods but not all. My old Ltr-24102B can but none of the 3 that KitnaIsntHappy has can do so.
Good luck with yours.