Question about self-boot vs boot-disc

[freak2000]

I just got my new DC last week. It was made in Jun 2000. The problem is that it won't recognized self-boot games. It was just go on to the Menu Screen and says "Please insert game disc". I am sure the disc is a self-boot disc because it has 2 sessions and burned with DiscJuggler v3.50.800 to get a cdi image. I am also sure that it has no error because it has all the files after the burn. I went and got a Utopia Boot CD v1.1 and Silent Scope as a boot-disc game (using the exact burn method) and it works fine. I tried every method in order to get my self-boot games to play with no luck. I have 2 questions:

1. Is it possible that my DC can recognized the Utopia boot disc but not able to run self-boot games (both are cd-r) ?

2. How can I convert these self-boot games to run on my DC ? (As now a days, boot-disc games are much harder to find)

Thanks