We are experiencing issue with regards to paypal icon not showing on the payment page. The alt tag for the image is displayed but no image.

The problem is with this constant: MODULE_PAYMENT_PAYPALEC_MARK_BUTTON_IMG which is actually located on line 96 in includes/languages/english/modules/payment/paypalwpp.php

PHP Code:
define('MODULE_PAYMENT_PAYPALEC_MARK_BUTTON_IMG', 'https://www.paypalobjects.com/en_US/i/logo/PayPal_mark_50x34.gif'); 
Currently using ZC 1.3.9a

Thanks!