Please help meeeee!!!

I have philips 400cdrw and an asus50x ... i have installed winme and diskjuggler ver 2 ..
I would copy some dc iso but it doesn't work cause they are 2 tracks and first of them is audio....
When the burn starts it stop coming to 2 traks and give me buffer underrun error ! Why?? It make so with cd copy too and with all dreamcast cd....
Please help me!!!!!