WDS Server 2012 R2 "The specified image file is either invalid or corrupted"

Hi,

I'm trying to setup a WDS in a 2012 R2 environment but I cannot add install image for x64 architecture.

I've managed to add boot images from both x86 and x64 architecture and install image for Windows 8.1 x86.

For everything else I receive the error message "The specified image file is either invalid or corrupted". The images used for setting up the install are 100% functional (I manualy installed the OS from them).

I tried to unconfigure, reconfigure, reinstall role, install on another machine, everything without success.

Thanks!