I suggest that you read the General Usage section in Daemon Tool's help over at
http://www.daemon-tools.cc, because you are definitely doing something wrong.
Besides, if chankast thinks it's the disc is a music CD, that has nothing to do with what you picked from some Internet list. Daemon Tools doesn't even need to use the Internet when mounting discs. Chankasts sees the disc as a music disc because
a) The game is not self-boot (somewhat likely)
b) The game is corrupt (not very likely)
c) Chankast's poor disc detection routines prevent the disc from booting (the most likely answer)
At this point if the likely answer is indeed c), use another emulator. All the other Dreamcast emulators out there are leaps and bounds ahead of Chankast, but of course, nothing prevents you from sticking with Chankast.