@Carlos
Are you able to reproduce problem on our demo site?
Yes, of course on your site demo is working without problems, so I ask because I have no idea why my site is not working.
Also, I have another problem, check the attachment, The pay button said, upload the new image but is not a payment for images and I'm not translating yet the plugin.
I try to change the submit value in TwoCheckoutPayment.php but is not working, I found this on cart.php and i change or just remove but still not working.
osp_buttons(round($total, 2), sprintf(__('Pay %s cart items for %s', 'osclass_pay'), $count, osp_format_price($total, 2)), '901x1x'.$user_id, array('user' => @$user['pk_i_id'], 'itemid' => @$user['pk_i_id'], 'email' => @$user['s_email'], 'amount' => round($total, 2)));
?>
My apologies for my questions and problems, but I purchase the plugin to run the premium options right away, thank you for your time