How can I use ipxe without Tiny PXE Server

[congnt92]

Hi devs,
First i'm sorry for my bad English.
I just want to use only ipxe without needed 3rd tool.
I booted VM from network then press Ctrl B to type command.
Follow demo guide, i type dhcp then chain to out demo.php (ipxe script). It work fine.
Since it work fine with our demo ipxe script, i try with my ipxe script on real machine.
I try to create a small menu.ipxe and put at root directory.
Run WM, boot from network then type command (see my screenshot)
It say that connection timed out.
I do not which step i did wrong. If i try 3rd tool (Tiny PXE server then menu.ipxe was configured by ipxe).
Please give me some hints. Tks