Thread: navigation bar in BV doesn't work, plz help

my domain: http://www.lamarquise-kw.com
I added to my site a navigation bar, and on the contact us page , when i click it doesn't direct me to the contact_us page that I already created using BV. Although I added the URL: http://www.lamarquise-kw.com/contact_us.html in the edit bottom window as was explained in the BV vedio tutorials, can any one help me plz???

Should be http://www.lamarquise-kw.com/contact_us.php