Likewise cannot copy DC games!

Hello there! I cannot copy any DC games. I own for example a copy of Metropolis Street Racer and when I try to copy the CD with Clone CD the copy does not start up in my Dreamcast-console.
How can I make it work? I am already using clony but that does not seem to help much. Is there any copy protection that I cannot detect perhaps? Please reply to me. Thanks!

[felt]

this may sound stupid is this an original or copy, originals cannot be copied, as for a copy i believe there is something about the cd that makes the copy of a copy not work, do not take my word for this but i am sure this has been a subject b4 on this site but it was a while ago, try the search facility on the site and see if it gives you some help, hope this helps you some.

[felt]

i copy all my copys and they work fine i olso make them selfboot ok
i use clone cd 2 copy copys