Haiku starts normally installed in a virtual machine. Why not start when installed on real hardware?
Obviously your hardware is not supported.
Does the LiveCD start?
The turse answers to your question have to do with the information provided in the question.
Asking why haiku does not boot without providing information as to what it does do and what hardware you have installed to does not give us any information to go on.
Please provide us with some information that may help us to help to you.