Sony nex 7 - 60 fps video shooting missing in the device

Hello,

I just purchased a nex 7, and when I searched for the 60fps mode, I only found that the maximum is 50i fx.

What's wrong with my device, I saw videos with the 60fps available in the same menu as mine, and everybody is shooting at 60fps.

I updated the firmware to 1.01 from sony.uk website, could it be related to that?

Thank you