[gPXE] Gpxe was crashed

[Fatih Tolga Ata]

Hi,
I have 3 ethernet cards: two of them are realtek 8169(10ec:8169) and the 
other one ise onboard realtek 8168. Now, If I integrate for onboard 8168 
driver, bios goes to dead, and it doesn't load. I have gigabyte mb with 
dual bios support, so no problem for dead bios. After the bios was dead, 
I loaded backup bios, and I tried again to integrate for 8168, and the 
result is same. After that I integrated gpxe for external 8169 cards. 
Bios worked well, but this time, I can't reach the bios! Bios didn't 
open when I press the "del" button repeatedly. Gpxe can be loaded, and 
boot selection menu(F12) can be loaded, but bios can't. When I press del 
button, system was crashed. If I wait to pass gpxe after boot sequence, 
a white screen comes up and system is crashing again. So if gpxe can't 
find any dhcp server or any iscsi path, the system is crashing.
My mab is Gigabyte GA-MA785GMT-UD2H(rev 1.0)
Bios version is F7
There no hdd or dvdrom in the machine
and there is a 2GB one module ddr3 ram.

Gpxe can find iscsi target and lun, but what should I do if I want to 
enter the bios, or If I want to gpxe not to crush after the boot sequence?

Regards.