Boot failed when I try to install windows server 2003 32-bit as a hyper-v terminal on the windows server 2012 r2 from .iso file. Can any one install properly? and how?

I want to create a hyper-v terminal of windows server 2003 on the 2012 r2. I have a .iso file of windows server 2003 and I put it in the virtual dvd rom. But when I try to boot, the boot failed message appear. What is the reason? and can anyone install it properly? Thanks in advance.

Mosharrof