windows 8 doesn't boot from undionly.kkpxe

[nobluesky]

Hi all.

I use undionly.kkpxe to chainload scripts and sanboot from iscsi.
kkpxe is much faster when "initialising devices", so there's no problem until i tried to boot windows 8 with it.

When i boot from Win8 with kkpxe, it reboots repeatedly.
I could boot windows 8 with undionly.kpxe but it has a delay with initialising.

So why can't i boot with kkpxe?

or

is there any solution to reduce delay with kpxe?

Thank you.