Brauche Hilfe brennen GD Roms - Hellp needed for burning GD_Roms

Hello i´m a guy from Germany. Last week i bought a nonchiped Dreamcast.
Ive downloaded Utopia Boot cd 1.1 and Boot CD 1.2.
My burner is a HP CD- Writer Plus 8100 v1.0n and burning the boot cd works fine. OK so far so good. But when i insert a gdrom in my Burner and want to make a image with DJ 2.0 it only reads the Data sector and audio sector and finishes `successful`!!! And the Image is about 3,5 mb´s. Can you help me Please ?

ThanX DC_Freak