Everything was working fine before I went on vacation.....

Here is what we have zenworks 6.5 sp2 (workstations doesn't seem to
matter have tried Dell 4400 and Dell 8400 same results)

Machines will image from boot CD's, but not from PXE. We boot from PXE,
get a dhcp and the preworx seems to start (flashes blue at the top) and
then the machine states zenworks shutting down.

Do you have any suggestions?

Thank you for your assistance,