PXE Boot error in virtualBox

[MehranBazgir]

Hi guys.
I've installed WDS on my windows server 2012 correctly and everything is fine, but when I setup a new machine to boot from PXE, it get the error below.(Error picture)
Note, The server have been installed on VirtualBox too.

Error

Error.PNG (63.93 KiB) Viewed 415 times

The new machine network configuration is shown in the picture.(NetConfig picture)

NetConfig

NetConfig.PNG (3.25 KiB) Viewed 415 times