Apple TV 3 error -3906
Trying to connect the new Apple TV 3 wirelessly to a router (Fritz!Box 7390) on its 5GHz channel, but we keep getting error 3906 after entering the passkey. With other words, the Apple TV recognizes the router, but isn't able to go past the step of entering the router's wireless passkey.
Router set to DHCP, mac address filtering (tried both on and off), encryption with WPA + WPA2 (not Enterprise), infrastructure mode, authentication: WPA-PSK, WPA2-PSK, data encryption: TKIP, AES-CCMP.
Router was reset, Apple TV was reset, several times the both.
Every Mac in the house connects to the same network without a whim, but the Apple TV 3 persists in an error 3906 message.
Apple TV 3-OTHER