Hvad er der i vejen med scriptet

hej er der nogen der ved hva fejlen er i det her script


det er en gæstebog når jeg skal til at skrive i den kommer det her:

Warning: Unknown error in c:\phpdev5\www\simplegbookv1\addrecord.php on line 75

Warning: Cannot add header information - headers already sent by (output started at c:\phpdev5\www\simplegbookv1\addrecord.php:75) in c:\phpdev5\www\simplegbookv1\addrecord.php on line 80


det her er så scriptet for addrecord.php:


<?php


//Setup the username, password and database name.
    $user      = "USERNAME";
    $password  = "PASSWORD";
    $db        = "YOUR DATABASE";

//Make a link to the database, then test the connection. If it cant link, due to bad username
//password, permissions, whatever, kill the process.
    $link = mysql_connect("localhost", $user, $password);

    if (!$link) die ("cant connect to mysql");

//select the database once connected.
    mysql_select_db($db, $link) or die ("cannot connect");


//Fieldnames used
//rec_id
//name
//email
//website
//location
//comments
//ip_address
//datesubmitted


// Record the ip address because it gives us a weird, creepy, almost erotic sense of power
$ip_address = GetHostByName($REMOTE_ADDR);


//set up the query to insert the entry into the guestbook
    $query = "INSERT INTO guestbook ( name, email, website, location, comments, ip_address, datesubmitted )

            values ( '$name', '$email', '$website', '$location', '$comments', '$ip_address', NOW() )";


//run the query
    mysql_query($query, $link) or die (mysql_error());



//close the sql connection.
    mysql_close($link);



//Email the form
  if ( count ( $HTTP_POST_VARS ) ) {
    foreach ( $HTTP_POST_VARS as $key=>$value ) {

      $msg.="$key: $value\n";

    }

    }



    $msg.="\n\n\nIP Info: $REMOTE_ADDR - ".gethostbyaddr($REMOTE_ADDR)."\n";



// headers for the email listed below
    $headers .= "From: $email\n";

    $headers .= "Content-Type: text/plain; charset=iso-8859-1\n";

    $recipient="YOU@DOMAIN.COM";

    $subject="New Entry Into The Guestbook";

    mail($recipient, $subject, stripslashes($msg), $headers);


//Once the data is entered, redirect the user back to the guestbook

  header("location: guestbook.php");

?>