You should really read the latest blog post on http://kodi.tv ... i don't evn own any atv2 boxes anymore ... so i am the wrong person to take it on (because i stopped development for this platform).
AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS(wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf(wiki)
READ THE IOS FAQ!: iOS FAQ(wiki)
