Check for 1 euro payment.
replace this codes
ipn.php $paylist = array("1.00" => 100, "10.20" => 1000, "20.70" => 2000, "40.80" => 3000);
config.php
$paypals[0]['mail'] = '
[email protected]'; // your paypal login
$paypals[0]['name'] = '100 Premium points 1,0 EUR'...