Dropdown menu not working anymore

Hello Everybody !!

After childing and updating theme dropdown menu are not working properly… items supposed to be nested are not shown as dropdown but in two different lines

http://newmasa.masacoustics.it/

Images here

Menu

http://postimg.org/image/bup3lan35/

Problem

http://postimg.org/image/lgeuxykhl/

Any idea to solve ?? ( .. i’m not too expert …)