Failed to show PXE Menu - DS6.9 SP6 - Surface

Hi Guys,

I'm facing trouble to boot up (and accordingly to Deploy) MS Surface Pro 2 with DS6.9 SP6.

I was firstly very happy to see that SP6 was released and was finally taking UEFI into support.

Unfortunately, booting with the Official Ethernet extension, the PXE fails to load and says "Failed to show PXE Menu".

Have you already seen that ? Is there any way to change the PXE menu mode to get it displayed correctly on Bios America ?

Thank you in advance for your help!