The Nissan Path

 hi all.. 
I cannot get my key to turn in the ignition.. 
my steering wheel isn't locked.. 
the little ring that illuminates on. .so I believe there is power going to it. 

any ideas..?????

I heated up my key with a lighter..I suspect the tumblers were frozen minus 22..
working now

yikes, thats a new one! I live in Winnipeg and have never had to do that!