Cannot enter equation in Solidworks 2015

I just installed Solidworks 2015 SP4.0 and I am having trouble using equations. When I am trying to set one dimension equal to another (see attached image, where SW 2014 is in the left part of the screen, SW 2015 is in the right part) by clicking green check mark, it works in SW 2014 but nothing happens in SW 2015. D1@Sketch1 is 2.51 dimension. Could something be wrong with the SW installation?

Thanks

Ivan

SolidworksGeneral