selfbooting help!!..

[M.I.A Recordz]

hello,
I have tried to make my dc non-self booting game into a dc self booting game and it didn't work. I followed the echelon's tutorial and it still didn't work. It burnt successfully but when i put it in my dreamcast...it loaded the beginning part(the Sega logo crap) and then it just went into a black screen and.... i could still hear the cd still spinning normally..
can anyone tell me whats wrong???
thanks...