Help with DiskJuggler 3

[The Mack of all Daddies]

i downloaded an iso and it came out in .cdi format, and when i burn it with diskjuggler, it burns fine with no errors but when i put it into the dreamcast, the dreamcast reads it as a music cd and the game wont play. I read at another site that the settings are supposed to be at 'mode 1' and 'TOC:CD-DA' so i changed it to those settings and the dreamcast still reads the game as a music cd. i really need some help. thanks to any replies