Scene reflectivity value field doesn't appear on solid works 2013

Hello,

I am trying to render an image but in my recently installed (and repaired instalation) of Solid Works 2013 and the field for "secene reflectivity" does not appear as you can see bellow.

Anyone having this experience and knows what causes it ou how to solve it?

Thank you.

Regards,

Pedro

SolidworksPhotoview 360