Lenovo ThinkPad X1 Carbon Ultrabook - Repository unavailable

Hi, we are currently evaluating buying multiple "Lenovo ThinkPad X1 Carbon Ultrabook" that we want to image with ZENworks. Since this laptop come with no LAN we had to use a Lenovo USB 2.0 Ethernet Adapter to boot up on the network. Now we are able to launch the PXE and click on the option "Start ZENworks Imaging Maintenance". We then get the splash screen and after a few seconds we get a popup saying "Could not find the ZENworks Repository. Activating manual setup program.". If we bypass the splash screen we can see that the network card is detected and configured properly. What can we do to make it work? Do we need to open an SR for this?

Lenovo USB 2.0 Ethernet Adapter
ThinkPad X1 Carbon Ultrabook Specs

Note: We run ZCM 11.2.1 MU2 on Windows 7 Ent SP1 x64

Thanks in advance for the help!