Can't burn selfboot disc by discJuggler V2.00.430-FTU

I'm using the Mitisumi 4804 CD-writter, I use "CD player to CD recorder" to burn the SB disc. It success to burn the disc but it can't work in my Dreamcast?? Any problem on the setting? The other problem is some copied game can't read in my CD-Rom "Creative 36X". Those games can read in my friend's CD-Rom "Creative 52X". Any one tell me why??