help with mail on sign up

[boots]

$db->query("INSERT INTO users (username, display_pic, login_name, userpass, level, money, crystals, donatordays, user_level, energy, maxenergy, will, maxwill, brave, maxbrave, hp, maxhp, location, gender, signedup, email, bankmoney, lastip, lastip_signup) VALUES( '{$username}', 'http://{$_SERVER['HTTP_HOST']}/images/avatar.gif', '{$username}', md5('{$_POST['password']}'), 1, $sm, 0, 0, 1, 12, 12, 100, 100, 5, 5, 100, 100, 1, '{$_POST['gender']}', unix_timestamp(), '{$_POST['email']}', -1, '$IP', '$IP')");

$i=$db->insert_id();

$db->query("INSERT INTO userstats VALUES($i, 10, 10, 10, 10, 10, 5)");

$db->query("INSERT INTO mail VALUES ('',0,1,$i,unix_timestamp(),'Welcome','Welcome to gang land killers')",$c);

if($_POST['ref']) {

require "global_func.php";

this does send the mail,but it dont show in the you have mail part,so when the new guy 1st logs in they dont know they have mail but the mail is in the mailbox

[boots]

Thank you Octarine :)