[SO74]

Hello,
 
I puchased these cans recently at one of the only stores that has these cans in my area.  I love every part of the headphone except from what I hear, both sides of the headband are supposed to swivel so do one ear monitoring.  My cans don't swivel which might sound weird but I don't know why this is the case.  Does anybody know why this is the case?
 
Thanks