Orange desimlockage /unlock process

Bonjour j ai fait la procedure de desimlockage orange mais lors que j'essaie de restaurer , message "This device is not eligible to this version"

Hello I make the work on my carrier to unlock my ipad, but when I try to restore appear "This device is not eligible to this version"

Mac Mini 2007 - 10.6.8 A jour /uptodate

No Firewall