[gPXE] Can't figure out why this won't work

[John H]

I've been trying to set this up without any joy. I can't figure out
what's wrong. I followed the directions here
http://www.etherboot.org/wiki/appnoted but when I boot through
virtualbox I get the error shown in the screenshot
http://imagebin.org/130538. No matter what I do I get this screen.
It's like it's ignoring the dhcpd.conf file but it isn't because if I
make a mistake in the file and restart dhcp it'll give me an error. I
also used the example in this video
http://www.youtube.com/watch?v=xMwauwshm_E. It works like his video
when I download his gpxe.dsk file but when I use the one I compiled I
get no where. Any suggestions?