Har fått något konstigt problem med min session vid inloggingen

Tjena
jag har fått detta errormeddelande

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\Moviesite\login.php:1) in C:\xampp\htdocs\Moviesite\login.php on line 3

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\Moviesite\login.php:1) in C:\xampp\htdocs\Moviesite\login.php on line 3
Plesse enter a Username and a password and try agin

men det roligaste är att jag har satt min session så högt upp det bara går typ

min kod ser ut såhära

 <?php
include('connect.php');
session_start();

 //LOGGA IN//
 if($_POST['submit'])
 {
$email = $_POST['email'];
 $password = $_POST['password']; 
 if($username&&$password)
 {
   
    

    $query = mysql_query("SELECT * FROM user WHERE email='$email'");
    
    $numrows = mysql_num_rows($query);
    
    if($numrows!=0)
    {
      // Code to login

      while($row = mysql_fetch_assoc($query))
      {
	   $id = $row['id'];
       $dbemail = $row['email'];
       $dbpassword = $row['password'];
      }

      //check to see if they match!

      if($username==$dbusername&&$password==$dbpassword)
      {
        echo "You're in! <a href='profile.php'>Click here to enter the member page.</a>";
        $_SESSION['id']==$id;
      }
      else
          echo "Incorrect password!";

    }
    else
        die("That user doesn't exist!");
 }
 else
     Die("Plesse enter a Username and a password and try agin");
 }
 ?>

vad e felet har jag glömt något?
Det var ett tag sen jag phpade Och jag e lite färsk på detta.

www.mycodez.se