Can you explain the problem you are having, and with what browser, browser version has the problem?
I have no problems seeing your site in Safari 2.0.2, Firefox 1.5rc3, Camino 1.0b1, Opera 8.51, or OmniWeb 5.1.2. I can click on all the menu entries, see all the photographs, switch between pages: everything seems to work. I do find, however, that the ad-blocking extension for Firefox, Adblock, completely blocks your site, leaving only a blank, brown page (I suspect, however, that Adblock needs to be updated for Firefox 1.5). PithHelmet, an ad-blocker for Safari, does not block any of your site.
I would start by making sure your pages meet accepted html/xhtml standards. Both www.
joelcadiou.com and
webamab.free.fr have errors according to the
W3C Validator. Some of the errors are that there are "illegal" characters in your captions. These errors will not break your page, they just make it so the page does not pass the validator with no errors or warnings.
BTW, very nice site, well laid out and pleasing to look at and use, plus, very nice photographs.