Help needed to detect copy protection

I am trying to backup my copy of a cd set of 4 disks (these are not a game), but all the latest copy protection detection programs cannot detect any protection. I know there is some sort of protection because every attempt to copy these disks with alcohol and clone have failed with all copies asking for original cd to be inserted. Any help would be greatly appreciated.

Have you tried ProtectionID 5.1e ?

Yes, have tried protection id also al-ray. Is there another detection program i can use

hm…can you email me the main exe pls ? RAR it and send it to rico at daemon-tools.cc