Problems copying already burned game (guilty gear x)

[Kerberos]

im having problems copying the backup of guilty gear x(the original backup works on the DC). it only reads and burns to this certain point. theres this ring(im guessing its a gap)on the backup that looks a little different color on the backup. diskjuggler doesnt read past that point and the dreamcast only reads the copy as a music CD. is there something im doing wrong?