Cannot configure dsn

[Miguel Angel]

Hi,

I have recently installed Horde 2.0 and IMP 3.0 on my system. I'm working
under Windows98, with an Apache 1.3.23 Server and a Mysql 3.23.49 database.

I have succesfully executed the scrips for the horde database creation but
as I try to login under horde, I get the following message:

**************************
A fatal error has occurred
object(pear_error)(7) {
  ["error_message_prefix"]=>
  string(0) ""
  ["mode"]=>
  int(1)
  ["level"]=>
  int(1024)
  ["code"]=>
  NULL
  ["message"]=>
  string(41) "Unable to connect to SQL server."
  ["userinfo"]=>
  NULL
  ["callback"]=>
  NULL
}
[c:\archivos de programa\apache group\apache\htdocs\horde\lib\Auth\sql.php :
109]
******************************************************************

This is the configuration I have in my horde\config\horde.php file for the
dsn:

$conf['auth']['driver'] = 'sql';
$conf['auth']['params'] = array();
$conf['auth']['params']['dsn'] =
'mysql(mysql)://horde:horde@tcp+localhost/horde';
$conf['auth']['params']['phptype'] = 'mysql';
$conf['auth']['params']['hostspec'] = 'localhost';
$conf['auth']['params']['protocol'] = 'tcp';
$conf['auth']['params']['username'] = 'horde';
$conf['auth']['params']['password'] = 'horde';
$conf['auth']['params']['database'] = 'horde';
$conf['auth']['params']['table'] = 'horde_users';

I have tried other type of configurations, setting up an ODBC driver for the
database, but this doesn´t either seem to work...

If anyone can help me overcome this problem, I would really appreciate.
Thank-you very much,

Miguel Angel.-