Download alcohol 52% which is free follow this tutorial until step 15 (the rest of the guide is for burning the disc which is not possible with alcohol 52%). Create a virtual drive and mount your new image. Now you can put your cd in a safe place and use your backup.
Thank you very much fr your help.
It worked just fine. But the thing is I still can't make a copy of the original CD. I tried with Alcohol burning Image, However, when I use the Copied cd I got a message " The CD isn't authenticated".