How to install?

when i try to flash my atv black it is failing to install what to do

Firstly I would suggest posting in the proper forum, this is for the original atv not the black one:

http://forum.firecore.com/129

[topic moved]

You will want to ensure your AppleTV is jailbroken before installing. More details on this can be seen here: http://support.firecore.com/entries/313334-pre-install-requirements