menu link to module position works only on frontage

Hi,
on my website I put a contact area at position Bottom6
made a menu link called "contact" with url /#gkBottom6
enabled and published
on frontpage, that goes well. When I click on the menu link, the website scrolls down to the correct position.
on other pages, it does not work. I tried to change the link with the complete url (example : http://www.mywebsite.com/#gkBottom6) but it still doesn't work.
I already did that kind of menu link on other Gavick templates and it works correctly on every pages
what could be the problem here ?
here's the link to the website http://www.coffrages-bois.fr
thanks

Hi

Interesting. Try using a link like www.coffrages-bois.fr#gkBottom6 it open in the right place when used in browser.