After you upload the files for the LinkPoint module you will need to make a change to the checkout_payment.php file on your web site in order to remove the session id from the URL.
https://www.domain.com/catalog/checkout_confirmation.php?osCid=a1b4r2d2c123dd4g213e4
Do a search for "FILENAME_CHECKOUT_CONFIRMATION" and look for the following code:
CODE
<!-- body_text //-->
<td width="100%" valign="top">
<?php echo tep_draw_form('checkout_payment', tep_href_link(FILENAME_CHECKOUT_CONFIRMATION, '', 'SSL'), 'post', 'onsubmit="return check_form();"'); ?>
You will need to add the word false to the following line of code:
CODE
<?php echo tep_draw_form('checkout_payment', tep_href_link(FILENAME_CHECKOUT_CONFIRMATION, '', 'SSL', false), 'post', 'onsubmit="return check_form();"'); ?>
You may also need to add an additional line of code towards the end.
CODE
<?php echo tep_draw_form('checkout_payment', tep_href_link(FILENAME_CHECKOUT_CONFIRMATION, '', 'SSL', false), 'post', 'onsubmit="return check_form();"');
echo tep_hide_session_id(); ?>