Need help with BootCD PLEASE!

[troppicks]

I just got introduced to dreamcast backups and have run into some problems with games that dont selfboot. I can play all selfboot games but cant seem to run a bootdisk. We have tried bootdisks that are known to work properly on other dreamcast consoles, we have made new bootdisks with Nero, DiskJuggler, Clone CD and others. We do get the spinning animal but after we carefully put (the dreamcast is spinning very fast still) the game in, nothing happens (it doesnt load). It only recognizes it as an audio (blue screen). All the games and bootdisks work fine on friends consoles. I have tried everything.... by the way our dreamcast was manufactured Aug 99. Please help!! Could we have a prob with our Dreamcast?