[imp] Problem with norwegian language selection, only english works

[Asbjørn Prøis]

Hello.
I've installed horde v2.2.3 with IMP v3.2.2, and have problem making IMP
use other languages then english.
If I choose norwegian (norsk bokmål), either when logging in, or from the
personal options, it makes no difference. It keeps using english!

My config/prefs.php in IMP looks like this :
$_prefs['language'] = array(
    'value' => '',
    'locked' => false,
    'shared' => true,
    'type' => 'select',
    'desc' => _("Select your preferred language:")
);

and config/lang.php in Horde looks like this :
$nls['defaults']['language'] = 'en_US';
$nls['defaults']['charset'] = 'ISO-8859-1';
$nls['languages']['en_US'] = 'English';
$nls['languages']['nb_NO'] = 'Norsk bokmål';

Any ide what could be wrong?

Asbjørn