Can’t 'Boot Tethered’ as SeasonPass saying it’s already untethered

I’m having issues booting my ATV2.

Trying to boot tethered through SeasonPass but I’m getting this error:

"The AppleTV2,1_5.3_10B809 firmware is untethered and does not require this process!"

I’ve searched old threads and I think it might be because I don’t have the files saved on my Mac from when I first jailbroke the ATV anymore.

If it is, any ideas on how can I get it working again?

Thanks.

5.3 is now untethered. You should use the latest Seas0nPass to jailbreak it untethered and do not have to boot it tethered anymore. Do it ASAP since Apple still signs 5.3.

The problem is that for fix this issue I do need to do tethered with 5.3

http://forum.firecore.com/topic/7557?page=5

any idea?