Problem imaging HP ZBook 15 & 17 via PXE Booting

I successfully injected drivers for  HP ZBook 15 and 17 into core server but I am not able imaging them via PXE booting. I see it communicate with PXE rep and load files but it does not get IP. Here is excerpt of the error:

The operation completed successfully.

IP addresses: 127.0.0.1

Waiting for IP address…………………..

and then it stays like that for two minutes or so and then it says

Timed before acquiring an IP address.

Windows IP confifugration

The operation failed as no adapter is in the state permissible for this operation

and then it starts all over again

IP addresses: 127.0.0.1

Waiting for IP address………………

Please help me with this as I have very urgent request...

Thanks