Help in zencart export

[asappia]

Hi,
I took a small export utility to add my producs to a catalogue (leguide.com)

the code I use is located at
http://img.leguide.com/extranet/expo...ide_csv_fr.zip

reading the code I see that
with default language it works right

as stated in the code

        if (isset ($_GET['language']) && isset ($accepted_languages[strtolower ($_GET['language'])]))
                $language_code = strtolower ($_GET['language']) ;
        else
                $language_code = DEFAULT_LANGUAGE ;
        $languages_id = $accepted_languages[$language_code] ;
        unset ($accepted_languages) ; 

if I don't put any GET variable I'll use my shop default language (italian)

now I was trying to do the export of the catalogue in english and in french

so I opened firefox trying to do
http://myshop.com/leguide.php?language=fr
and it worked right
while
http://myshop.com/leguide.php?language=en
doesn't work at all

attached is the debug autoload I get from the three attempt (it,fr,en)

The attachment is a zip file with three txt (dump of the three request)
http://myshop.com/leguide.php?language=it
http://myshop.com/leguide.php?language=fr
http://myshop.com/leguide.php?language=en

it's clear that something wrong happens in
actionPoint=>110 include('includes/init_includes/init_templates.php');
actionPoint=>120 $_SESSION[navigation]->add_current_page();

while language=en is in $_GET
but I've no clue on where to search

thanks for any help