[horde] Help with login problem

[Admin-Stress]

Hi, maybe this is old question, but I cant find any resources.

I installed:
- horde 2.2
- imp 3.1
- php 4.3.0
- redhat 8.0

imap and pop3 are working fine, I can access it via mail client (mutt and outlook express).

But, when I login into imp, I got this error :

A fatal error has occurred:

DB Error: connect failed

[line 108 of /var/www/vhost/example.com/htdocs/horde/lib/Prefs/sql.php]

Details have been logged for the administrator.

I review ../config/horde.php for mysql details :

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

And I can connect to mysql like this :

# mysql -D horde -h localhost -u horde -p

With password=horde

Here is line 108 of sql.php :

            /* Connect to the SQL server using the supplied parameters. */
            include_once 'DB.php';
            $this->db = &DB::connect($this->params, true);
            if (DB::isError($this->db)) {
108--->         Horde::fatal($this->db, __FILE__, __LINE__);
            }

I checked pear DB module, and it's installed :

   # pear install DB
   DB already installed


Please help me, this is my frist time installing imp.

Thanks in advance,
kapot

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