replaced bose cd player with a 2005 bose cd player, now the steering wheel controls don't work?

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I replaced my Bose 6 disk OEM CD player in my 2009 350Z with a (brand new) Bose 6 disk OEM CD player with cassette from a 2005 350Z. Now my stereo steering wheel controls don't work. Both players have identical plug-ins on the back of each unit. They both have the same pin location with each plug. Both units work off of steering wheel controls. Why won't my steering wheel control work for this new unit? All manual controls work fine on the unit but I've lost the steering wheel control function?