No DHCP for onboard NIC after PXE

[Kelly_Gafford]

I am trying to use FOG to image several Proliant Servers. When  I boot the server, I receive the initial PXE menu from FOG, however, if I attempt to register the system, download an image, or create an image. The server will attempt to get a new DHCP address and fail with the Onboard NIC. I can install and add-in NIC and it will work fine, however the onboard always fails. I've gone through the BIOS looking for anything that might prevent it from getting a DHCP but can't see anything that would prevent it. 

Has anyone run into this problem before. I get it on Proliant Gen 5 and Gen 8 servers. 

Thanks
kg