ATVFLASH installation

When i first packed my out of the box and booted it up for the first time, there was an intro playing with sound.
I then installed ATVFlash, but I fucked up , so I did a factory reset of my AppleTV. When it booted up with the original software from Apple there was no sound with the intro screen.

Any idea

Tried a search?

http://forum.atvflash.com/viewtopic.php?f=6&t=2977&p=12575#p12575