I set up a netboot image and a netinstall image on my computer. I've set permissions and everything and doubled checked; however when I try to boot from my laptop, it won't boot.
I know this is something simple, but have you started the net boot service in server admin? I know this is obvious, but I've seen on more than one occasion people getting so involved in getting everything else set up they over look the simplest step. Also, Bombich has a pretty indepth article on net booting on his site. Maybe give it a look and see if anything stands out as something you may have missed. http://www.bombich.com/mactips/netboot.html
Good luck