When I boot a white box PC of mine via PXE all appears normal until it loads:

ZENworks Preboot Management Client V5.0 r2 (build 105)

Then the boot process stops with:

"ZENworks Preboot shutting down"
"Network Boot Aborted"

DHCP appears to work, and the workstation is assigned an IP address. The IP
stack works (at least you can ping it).

The workstation is running an Asus A7V-E mobo (bios V1004) with a VIA
Apollo KT133 chipset. I've had issues in the past with other Linux distros
and this chipset.

The NIC is a 3C905C-TX-M.

Any info appreciated. Thanks in advance.