hkt 3030 and backups

[samantho]

hello to everyone and sorry for bad my english,
i've a dreamcast (hkt 3030)...it don't read any cd-r.
i 've some cdi's images,i 've burn them with djuggler.....but when i put them in my dreamcast it read the cd-r like a cd music or go to menu.
if i use cdi's image with chankast i' ve no problems.if i use in chankast cd-r ,some game are playble other go to music menu...
the only game that works on my dreamcast is doa2 (is a cd-r makes from a cdi image using disc juggler 3.0...like other games,but they don't run......)
why doa2 run and other games no !??! if images (daemon tool) run with chankast maybe them are selfboot...and so will be selfboot on my dreamcast too!?!?
...a new bios problem?!?!?

with utopia disc nothing happen...
ther's a way to play cd-r on dreamcast hkt 3030 with new bios !??!
can someone explain me step by step ?
please just a little help!!!
thank's