Google Checkout No Longer Working

Not sure what has happened but Google Checkout has stopped working (not sure why). Here is the code:

Code:

	  <fieldset>
	    <legend>Payment Method</legend>
	    
	    {* Select Payment System in same way, only if its count > 1 *}
	    {if $smarty.request.hide_paysys }
		<input type="hidden" name="paysys_id" value="{$smarty.request.hide_paysys|escape}">
		<input type="hidden" name="hide_paysys" value="{$smarty.request.hide_paysys|escape}">
	    {else}
	    {if $config.product_paysystem}
	    {assign var="paysys_id_not_required" value="1"}
	    {else}
	    
	    {foreach from=$paysystems item=p} 
	    {if count($paysystems)>1}
	    <input type="radio" class="radioInput" id="paysys_id{$p.paysys_id}" name="paysys_id" value="{$p.paysys_id|escape}"
	    {if $p.paysys_id eq $smarty.request.paysys_id }checked{/if} />
	    {else}            
	    <input type="hidden" id="paysys_id{$p.paysys_id}" name="paysys_id" value="{$p.paysys_id|escape}" />
	    {/if}
	    <p class="radio">{$p.description}</p></p>
	    {/foreach}
	    
	    <!--
	    <p><input type="radio" id="paysys_idpaypal_r" name="paysys_id" value="paypal_r" class="radioInput" checked="checked" />
	    <p class="radio"><strong>PayPal Payment</strong><br/>
	    Pay using the secure PayPal payment gateway.<br/>
	    No PayPal account required.</p></p>
	    
	    <p><input type="radio" id="paysys_idgoogle_checkout" name="paysys_id" value="google_checkout" class="radioInput" />
	    <p class="radio"><strong>Credit/Debit Card</strong><br/>
	    Secure credit or debit card payment.<br/>
	    Uses the Google Checkout System.</p></p>
	    -->
	  
	  </fieldset>

NB: The commented-out code at the bottom is there for testing purposes.