Sometimes it boots, sometimes it doesnt...

[Lateralus]

I have read through this board -> Yes
I have read a faq -> Yes
xxxxxxxx -> probably not

Getting some bootable Ech files and burning them without a hitch using DJ. Putting them into my dreamcast, sometimes they will start up right away, sometimes i have to power off and on a dozen times before it works. When it doesnt work it comes up with the audio player portion. Is there anything I am maybe missing, or is this just the way it goes?

NFL2K2
Crazy Taxi 2
etc.

Once they start up they run fine ).

TIA.