Booting from ROM crashes after ipxe.iso runs with timeout

[Venca]

Hello together,
I have similar problem, so I decided to use this thread.
I am using Award BIOS with Davicom network controller. I generated rom file and I included this ROM to the BIOS itself via cbrom. But when I am trying to perform PXE boot I always stuck at romprefix.s "exec" function(?probably - I did not debug?). Last message showned on the screen is:
"iPXE (PCI 00:13.0) starting execution..." and nothing happened.

I tried normal build and bin-x86_64-pcbios option. I also tried to exclude all not necessary option to have rom file smaller that 65kB.
Ineresting is that gPXE(version 1.0.1) works in the correct way, but I fails on latest iPXE.

Please, do you have any idea what could be wrong? I probably did some stupid mistake or forget somethink important.

Thank you very much in advance.

Best regards,
Vaclav