selecting data from 2 tables

[eluser]Bigil Michael[/eluser]
one more help please

my table

id constituency_id candidate_name candidate_votes elect_year

1 2 Selvaraj 123456876 2011
2 4 kk 4678 2010
4 1 George 75 2011
5 1 Nagappan 15 2011
6 1 Suresh 5 2011
7 2 Ravi 20 2011
8 2 sajith 5 2011
10 1 sssssss 11111 2010

i want to select cndidate name who has max:candidate votes
i searched but i didn't get result

code me used is

function select_win()
{
this->db->select('candidate_name');
$this->db->select_max('candidate_votes');
$result_product = $this->db->get('candidate_details');
return $result_product->row_array();
}

it prints maximum votes
not candidate votes
i want the candidate name
can u help me??
thanks in advance........