Hello,
As I wrote in an earlier post, you need to REMOVE the style-New.css (or remove the part concerning the nav element from it) from your <head></head> element and REPLACE the existing css/responsive.css with the one from the .zip file.
I did those two steps on your website and the responsive menu works as it should. The responsive.css is taken from your site and modified so you won’t lose any other styling. Also, as I’ve said before, make a backup of your existing files before replacing.
Without those steps the menu won’t be shown correctly.
Robert
