problem z mojim serverom..pls pomoc

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\web\admin.php:2) in C:\xampp\htdocs\web\admin.php on line 7

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\web\admin.php:2) in C:\xampp\htdocs\web\admin.php on line 7

<html>
<?php
session_cache_limiter('private');
$cache_limiter = session_cache_limiter();
session_cache_expire(10);
$cache_expire = session_cache_expire();
session_start();
?>
<head>
<title>ADMIN</title>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1250">
</head>

<body>

session_start();