First of all please let me apologize for my English skills; I'm French (shame on me?!)

I'm using Pale Moon 8 on my Windows 7 64 bits laptop.
I'm experiencing some problems with the French localization XPI provided on the official website. When I click on the link there, nothing happens. Even if I download the file itself and load it using the browser, still nothing happens.
I tried to run Pale Moon with administration rights, but it changed nothing at all.
What am I doing wrong ?
T.