Here is what I posted in another thread:
That’s a known issue. What you need to do is go and download a kernel from here,[URL=‘http://sourceforge.net/projects/freeghost/files/Kernels/’]http://sourceforge.net/projects/freeghost/files/Kernels/ [/URL]then whichever kernel you download, you will need to rename to [B]bzImage[/B]. Once this is done, first rename the original kernel to something like bzImage.backup. This is located in /tftpboot/fog/kernel. Once you rename the kernel you downloaded, move it to this folder and you’ll be all set. Just note that it has to be spelled [B]bzImage[/B], all lowercase besides the I. If a capital letter is not right, it will not boot.