Per FCC regulations, wireless networks in the U.S are limited to channels 1-11. That means that U.S. marketed wireless devices are set up in their firmware to only have access to those channels and not the higher ones.
Basically using channels 12-14 is a violation of a regulatory law, sets you up as a source of radio interference for licensed users of those frequencies, and basically makes you a scofflaw. Yes, I have strong opinions about this, and I think you're doing a bad thing by using those channels.
Why on earth would you need to use those particular channels anyway?