DB Slave Search Server

[TechGuy]

I am attempting to use a MySQL slave server for search only. I have followed the advice in other threads in the forums and have modified my config.php as:

$config['Database']['dbtype'] = 'mysql_slave';
if (THIS_SCRIPT == search)
{
$config['SlaveServer']['servername'] = '192.168.0.4';
$config['SlaveServer']['port'] = 3306;
$config['SlaveServer']['username'] = '****';
$config['SlaveServer']['password'] = '*****';
$config['SlaveServer']['usepconnect'] = 0;

}

With these changes Vbulletin returns a blank white page. I modified the php.ini to turn all error logging on, however, I continue to receive no errors on screen nor in apache's error.log.

Any advice would be appreciated!