How do I upgrade to IOS 5.x on my JB ATV2

What I got:

ATV2 version 4.3 JB running with XBMC for streaming videos from external HDD(AirPort Extreme), which works perfectly.

What I want:

Update to IOS 5.x so NETFLIX becomes a part of my ATV.

Why I need help:

  • I tried to update via ATV menu, but it tells me its up to date.
  • i tried to reset ATV from the menu… Nothing changes
  • Tried to reset through NitoTV - did not work
  • Tried to reset through iTunes - did not work

Wanted to reset and then try to update again to se if that worked.

  • even tried get update/upgrade through SSH - still no luck

Can anyone help me out here?