Huge problem with paypal

[aber]

Hey, I have problem with paypal people don't receive points...

var/www/paypal.htm

<b>Automatic PayPal Donation System.</b><br><br>
The donation costs 3 EUR (incl. VAT).<br>
After the donationyou will receive <b>1800 points + 200 bonus points (Tot. 2000 points)</b> in your account automatically. <br>Because you donate with PayPal / Creditcard you will receive +200 extra bonus points for free.<br><br>

<b>Here are the steps you need to make:</b> <br>
1. You need a valid creditcard <b>or</b> a PayPal account with a required balance [3 EUR]. <br>
2. Fill in your account number. <br>
3. Click on the donate button. <br>
4. Make a transaction on PayPal. <br>
5. After the transaction 2000 points will be automatically added to your account. <br>
6. Go to Item shop and use your points <br> <br> <br> </b>



<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_donations">
<input type="hidden" name="business" value="david<hidden>@o2.pl">
<input type="hidden" name="lc" value="GB">
<input type="hidden" name="item_name" value="myServerName">
<b>Account number:</b> <input type="text"  name="custom" value="">
<input type="hidden" name="item_number" value="1">
<input type="hidden" name="amount" value="3">
<input type="hidden" name="currency_code" value="EUR">
<input type="hidden" name="no_note" value="0">
<input type="hidden" name="no_shipping" value="0">
<input type="hidden" name="currency_code" value="EUR">
<input type="hidden" name="notify_url" value="http://www.myServerName.net/ipn/ipn.php">
<input type="hidden" name="return" value="http://www.myServerName.net">
<input type="hidden" name="rm" value="0">
<input type="hidden" name="bn" value="PP-DonationsBF:btn_donateCC_LG_global.gif:NonHosted">
<input type="image" src="https://www.paypal.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online.">
<img alt="" border="0" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>

var/www/paypal/ipn/ipn.php

<?
$mysql_host = 'localhost'; //Leave at localhost
$mysql_user = 'root'; //DB User
$mysql_pass = 'myBBpass'; //DB Pass
$mysql_db = 'forgottenserver'; //DB Name

$custom = stripslashes(ucwords(strtolower(trim($_REQUEST['custom']))));
$receiver_email = $_REQUEST['receiver_email'];
$payment_status = $_REQUEST['payment_status'];
// connect db

$db = mysql_connect($mysql_host, $mysql_user, $mysql_pass);
mysql_select_db($mysql_db, $db);
if ($payment_status == "Completed" & $receiver_email == "david<hidden>@o2.pl") {

$query = "SELECT premium_points FROM accounts WHERE accounts.name = '$custom'";

$result = mysql_query($query);

$prem = mysql_fetch_array($result);

$points = $prem['premium_points'] + 2000;
// $points = mysql_query($prem)
$qry2 = "UPDATE accounts SET premium_points = '$points' WHERE accounts.name = '$custom'";

$result2 = mysql_query($qry2);
}
else
 { 
 echo("Error.");
 }
?>

Whats wrong? I think I made bug here
<input type="hidden" name="item_name" value="myServerName">
what should I put there?

and look here
<input type="hidden" name="notify_url" value="http://www.myServerName.net/ipn/ipn.php">
maybe should i change it to http://www.myServerName.net/paypal/ipn/ipn.php ?

is there any other bug?

thanks, rep++