[horde] $conf['menu']['apps'] not changed in conf.php after conf.xml executed

[alex]

After execute Configuration (imp/turba/nag/mnemo ...) in Administration,the 
$conf['menu']['apps']  entry in horde/imp/config/conf.php seems not changed.

P.S I have already chown horde/imp/config.php as nobody before and DOM XML 
support for php was enabled.

Alex