Mooch - you are not alone.
This has been driving me crazy for the past 2 months, ever since I bought it. My iPad can't even see the PC
My Mackie Controller is set up (as is everything else, including Firewall, router etc) as per the Neyrinck site and even after leaving it for over 30 minutes, it never connected.
AC7 working perfectly here also.
Good luck, at least you're halfway there......
Cheers,
Jerry