MySQL Connection Problem

[eluser]Mareshal[/eluser]
error fixed:

$db['elite']['db_debug'] = FALSE;

but now I have another problem:

Fatal error: Call to a member function num_rows() on a non-object in /home/*****/public_html/elite/dev/libraries/E_db.php on line 18

e_db is my library

Code:

function check($table, $where){
        $query = $this->ci->db->get_where($table, $where);
        return $query-> num_rows();
    }

this is the code

I tried affected_rows or return $this->ci->db->count_all_results(); but nothing

Fatal error: Call to a member function num_rows() on a non-object in /home/*****/public_html/elite/system/database/DB_active_rec.php on line 1080

in logs I see same error