The weird thing is the task says it is completed even though the machine is still in the active category. It also states following policy has been made available but then nothing happens.
Chances are its because the NIC wasn't installed with the OS. I had a similar problem. What I did to resolve it was to have the NIC driver files copied locally during the winpxe stage and then configure the unattend.txt with the path.
It assumes the drive is the system (c:) drive so all you need to add is the sub folder path to the driver inf file. Here is what mine looks like.
1.bmp 598.6 K
I am actually using the deploy Image feature since I have a sysprep image all ready built. I can certainly go to the other method but would prefer not to.