hi there,
I am trying to set up a subscription payment button. When I test it, I get this error:


We are sorry, we are experiencing temporary difficulties. Please try again later. If this error occurred while making a payment, avoid duplicate payments by checking your Account Overview before resending a payment.
Message 3005



This is the code i am using:

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="image" src="https://www.paypal.com/en_US/i/btn/x-click-but20.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
<img alt="" border="0" src="https://www.paypal.com/en_GB/i/scr/pixel.gif" width="1" height="1">
<input type="hidden" name="cmd" value="_xclick-subscriptions">
<input type="hidden" name="business" value="my@email.com">
<input type="hidden" name="item_name" value="my subscription">
<input type="hidden" name="no_shipping" value="1">
<input type="hidden" name="no_note" value="1">
<input type="hidden" name="currency_code" value="GBP">
<input type="hidden" name="lc" value="GB">
<input type="hidden" name="bn" value="PP-SubscriptionsBF">
<input type="hidden" name="a3" value="10.00">
<input type="hidden" name="p3" value="1">
<input type="hidden" name="t3" value="M">
<input type="hidden" name="src" value="1">
<input type="hidden" name="sra" value="1">
</form>


I have read about this error and confirmed my paypal email, bit still get the error.
Any ideas?