Thumbnails in generated internet page doesn't always display

[The Poy]

When generating an internet page with a collection of pictures, pages display well on local (Win XP SP2, tried 2 browsers Firefox and IE).
But when uploaded on server (personnal internet page with french IAP Free) I only get a few thumbnails displayed.
Same probleme with both browsers.
Eroor console messages (only 2 when on remote) don't talk very much.
Many more error messages on local, but display works.
Doesn't know if the problem is within the flash photo album plugin used, or in the way it is used in XnView...

[xnview]

Could you please post the .html?