The attachment you posted doesn’t work. So I can’t really help with whatever error you’re seeing. Please try posting the error again.
And, if you’re quick-registering hosts AND using the FOG client, then the computers will get named with the MAC address.
If you full-register a host AND use the FOG client, and then hit enter through every prompt, the computers will get named with the MAC address.
I’d highly suggest you don’t just blaze through registration. It’s there to make your life easier. FOG will name computers FOR YOU, and can join them to the domain FOR YOU if you simply give the host a proper name during registration, or give it a name later on in FOG’s web management console.