Error: No Payment Gateway Variable Is Set!

[Guest jamiejoe]

Website: www.expressivethoughtsvinyl.com/store

CC version 3.0.17

After using PayPal Standard & IPN (Credit Card), when the payment has been processed and I click on "Return to Expressive Thoughts Vinyl" I get the "Error: No payment gateway variable is set!" The order is paid and everything.

In PayPal, my Auto Return for Website Payments is set to http://www.expressivethoughtsvinyl.com/store/confirmed.php

I've seen posts here and there about this, but none specifically for PayPal Standard & IPN, and the suggestions listed haven't worked.

Please help me!!!!

UPDATE:

I got past the "Error: No payment gateway variable is set!" by adding:

elseif($module['method']=="ipn"){

$hiddenVars .="<input type='hidden' name='return' value='".$GLOBALS['storeURL']."/confirmed.php?act=conf&amp;oid=".base64_encode($cart_order_id)."' />

<input type='hidden' name='cancel_return' value='".$GLOBALS['storeURL']."/confirmed.php?act=conf&amp;f=1&amp;oid=".base64_encode($cart_order_id)."' />

<input type='hidden' name='notify_url' value='".$GLOBALS['storeURL']."/modules/gateway/PayPal/ipn.php' />\r\n";

}

in my transfer.inc.php file, right after :

$hiddenVars .="<input type='hidden' name='return' value='".$GLOBALS['storeURL']."/confirmed.php?act=conf&amp;oid=".base64_encode($cart_order_id)."' />\r\n

<input type='hidden' name='cancel_return' value='".$GLOBALS['storeURL']."/confirmed.php?act=conf&amp;f=1&amp;oid=".base64_encode($cart_order_id)."' />";

}

Mentioning this for anyone else with this problem. Found info here: http://www.cubecartforums.org/docs/index.php?id=75

****UPDATE to my update****

Now it isn't working again! Anyone????