Trying to downgrade ATV2 from 5.1 to 5.0.2

Hello,

 

While trying to downgrade my apple tv 2 to 5.0.2, I get a error in itunes, saying iTunes restore script failed, selecting IPSW in finder. But when i i select it in finder, nothing happens…

 

Also, I can’t restore my Apple TV in iTunes ?

 

I can see the ATV, but while trying to push the restore button, it says it can’t find the device ??

 

Anyone there now what to do now ?

Downloaded iTunes 10.7 now it works !