Infomaniak.ch Gallery et PHPBB2

Infomaniak has provided somedays ago a modified version of gallery based on 1.4.4pl6 which works even if exec() is not permitted on their server.

Actually my gallery is working on their website, but the gallery embedded inside Gallery don't :-?

Even with the good link, I only see gallery but nothing from phpbb:

http://www.macolo.fr/modules.php?op=modload&name=gallery&file=index

Any idea or directives would be greatly appreciate...Thanks