Like many I did a new jail break with greenpois0n RC6 only to find out that once you install ATV Flash you lose your wifi connection and you cant see the maintenance menu. I redid the jail break and used ATV Flash Beta 2 and it works. The only bug still is that if you unplug power or reboot the AppleTV it comes back up and says you have no wifi. If you simply restart Low Tide the wifi comes back on line.
1. restore AppleTV in iTunes
2. run Greenposi0n RC6
3. Once jail broken, set up wifi and click on greenpois0n to install jail break
4. Once AppleTV has restarted run ATV Flash Black Beta 2 (not the newest)
5. Reboot ATV and if you have no wifi then you just go to NitoTV and restart Low Tide