Sprint007

I have a 2011 limited edge and I can't seem to figure this out. No matter what setting I use or fan setting, no hear or ac comes out the back seat vents. I never ever feel anything coming from the vents on the back of the console no matter what I do. It is -20 here in Minnesota right now and the front of the car is warm and the kids in the back are cold so I reach back and of course feel nothing coming out. Am I the only one with this issue? Am I missing something?