ATV Freezed

I Installed the ATV Flase, use my 1tb disk as external and everithing OK, but when installed the boxee application, the screen freeze, not response to any command and when reboot nothing happen, What can I do?

Is there any way to restore the ATV to the factory settings?

You may need to ‘un-pair’ the remote as described here: http://wiki.atvflash.com/index.php?title=Remote