Apple TV doesn't see Extreme Dual Band 5Ghz network.

I have a new DualBand Extreme that I purchased mainly to give my AppleTV the full "whammy" of "N" bandwidth. The ATV is located in the bedroom of a very small house, but does not see the 5Ghz band, even though it connects easily with the 2.5Mhz band and shows a full strength connection. I am a bit confused because I thought the 5Mhz had the greater range. (When I move the ATV closer to to the DB Extreme, it does pick up the 5Mhz band...). FYI.. the 5GHZ has a separate name so I know if I am on the dedicated "N" network or not.
I realizethe ATV is making an "N" connection on the 2.5Ghz band, and in the absence of a/b/g devices on the network is probably doing as well as the 5Ghz band would, but... does anybody have any ideas on why I get the 2.5 but not the 5?

I`m no wlan expert but are sure you carn`t change the channel from what I`ve read the 5Ghz band is still split up into channels ranging from 7 to 196 depending on which country you live in:-
http://en.wikipedia.org/wiki/Listof_WLANchannels
Maybe your router is just set to automaticly select one?

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