Problems with N12 PXE

[spaceman78]

I have a Problem with configurating the PXE boot without the F12 button.

Here's my configuration:

- PXE Policy: only respond to known clients

- Client prestageg in ADS with GUID

- DHCP, ADS, WDS and DHCP on same server

- Option 60 and 66 enabled

- Unattend file for WDSClientUnattend enabled, Unattend Setup enabled

- Image associated unattend file for unattend oobe

- reserved IP for client within DHCP

When I use the original PXE file (pxeboot.com) everythings working well. After pressing F12, PXE boots into WinPE, applies the Image and reboots the system. Since I do not press F12 during that reboot, the installation is finished.

But when I rename the pxeboot.n12 to pxeboot.com PXE is running into loops: PXE is booting WinPE, applies the image and after the reboot it all starts again.

I think there should be a flag on the server, so the PXE knows that it schould not load WinPE. How do I have to configure the WDS server to reach tht goal?