My SQL Session start fail...

[AmenKa]

Hey, I have here a small amount of code to gather the # of active users... The script itself is fine (I think), but the session_start is giving me issues... Any help would be great!
PHP 5.2.*
MySQL 5.*
<passwordhere> is the actual pass on the normal script of course .
(problem below)
Code:

<?php
mysql_connect('localhost', 'shadowte_shadow', '<passwordhere>');
mysql_select_db('shadowte_site');
session_start();
function update_sessions()
{
    $sid = session_id();
    if($_SESSION['sitename_online'] == "1")
    {
        mysql_query("UPDATE `shadow_sessions` SET `time` = '". time() ."' WHERE `sid` = '$sid'") or die(mysql_error());
    }
    else
    {
        $_SESSION['sitename_online'] = 1;
        mysql_query("INSERT INTO `shadow_sessions` SET `time` = '". time() ."', `sid` = '$sid'") or die(mysql_error());
    }
}
function get_onlineusers()
{
    $min = time() - 301;
    mysql_query("DELETE FROM `shadow_sessions` WHERE `time` <= '$min'") or die(mysql_error());
    $query = mysql_query("SELECT COUNT(sid) FROM `shadow_sessions`");
    $num = mysql_fetch_row($query);
    return($num[0]);
}
update_sessions();
echo "There are currently ". get_onlineusers() ." users online.";
?>

error received:
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/shadowte/public_html/shadowtechstudios.net/php/usercount.php:9) in /home/shadowte/public_html/shadowtechstudios.net/php/usercount.php on line 10

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/shadowte/public_html/shadowtechstudios.net/php/usercount.php:9) in /home/shadowte/public_html/shadowtechstudios.net/php/usercount.php on line 10
No database selected

if you would like to see it yourself:
http://php.shadowtechstudios.net/usercount.php

Thanks again.

Update: after removing the html formating I do not recieve the php errors, however I do still get the no database selected... can someone tell me why it doesn't see what database i chose?

[jc_gmk]

session_start(); has got to be the first thing on your page or it won't work properly!

[boogyman]

actually second... the <?php needs to be first or the session wont be initiated in the first place... but you made the assumption it was there anyway

[AmenKa]

I moved session start two lines up (directly below <?php), I get the same thing: No database selected.:

<?php
session_start();
mysql_connect('localhost', 'shadowte_shadow', '<pass>');
mysql_select_db('shadowte_site');
function update_sessions()
{
    $sid = session_id();
    if($_SESSION['sitename_online'] == "1")
    {
        mysql_query("UPDATE `shadow_sessions` SET `time` = '". time() ."' WHERE `sid` = '$sid'") or die(mysql_error());
    }
    else
    {
        $_SESSION['sitename_online'] = 1;
        mysql_query("INSERT INTO `shadow_sessions` SET `time` = '". time() ."', `sid` = '$sid'") or die(mysql_error());
    }
}
function get_onlineusers()
{
    $min = time() - 301;
    mysql_query("DELETE FROM `shadow_sessions` WHERE `time` <= '$min'") or die(mysql_error());
    $query = mysql_query("SELECT COUNT(sid) FROM `shadow_sessions`");
    $num = mysql_fetch_row($query);
    return($num[0]);
}
update_sessions();
echo "There are currently ". get_onlineusers() ." users online.";
?>