IMP 2.3.7, prefs, and Postgresql 7.0.3

[FreeBSD]

I just recently installed IMP 2.3.7 from cvs (as of last night), and have
not been able to get prefs to save to postgresql. I have created the horde
table and the horde_prefs table in it. I created both hordemgr and www
users as well as giving both all privs with psql. In my
horde/imp/config/conf.php I have:

$conf['prefs']['driver'] = 'sql';
$conf['prefs']['params'] = array();
$conf['prefs']['params']['phptype'] = 'pgsql';
$conf['prefs']['params']['hostspec'] = 'localhost';
$conf['prefs']['params']['username'] = 'www';
$conf['prefs']['params']['password'] = 'hordepass';
$conf['prefs']['params']['database'] = 'horde';
$conf['prefs']['params']['table'] = 'horde_prefs';

I have tried 'www' as username, 'hordemgr' as username, neither worked. I
tried rebuilding the database, I tried reinstalling IMP from cvs, nothing
has worked. Postgresql is running and listing on the default 5432 tcp
port. It seems everything else works (send mail etc) but for prefs.

test.php returns:

Horde: System Capabilities TestHorde Versions
        Horde: 1.3.4-cvs
        IMP: 2.3.7-cvs
        Turba: 0.0.2-cvs
      PHP Version
        View phpinfo() screen
        PHP Version: 4.0.6-dev
        PHP Major Version: 4.0
        PHP Minor Version: 6
        PHP Version Classification: dev
        You are running a supported version of PHP. Enjoy the ride!
      PHP Module Capabilities
        FTP Support: Yes
        Gettext Support: Yes
        IMAP Support: Yes
        LDAP Support: No
        MCAL Support: No
        Mcrypt Support: Yes
        MySQL Support: No
        PostgreSQL Support: Yes
        XML Support: Yes
      Miscellaneous PHP Settings
        magic_quotes_gpc set to Off: Yes
        magic_quotes_runtime set to Off: Yes
      PHP Sessions
        Session counter: 1
        To unregister the session: click here
      PEAR
        PEAR - Yes
        Mail::RFC822 - Yes
        Log - Yes
        DB - Yes

Please, does anyone have any ideas? Thanks in advance.