FireStarter

My CD is almost ready, but I've 1 problem. When windows setup is ready, the PC wants to boot for the first time fully installed. But when I want to see the windows XP boot logo I get nothing, only a black screen with a white flashing underscore on the top left of my screen. And Windows doesn't boot. Save mode doesn't work. What did I do wrong? Is there another way? Ps: It worked in a VMware environment, but not in a normal mode.