gform_post_submission - add data to wp_postmeta

I am trying to add some custom meta data to a post and am trying to use gform_post_submission as I am using V1.5.

Below is the code/function I am supposed to be executing (inside my themes functions.php file), however the rows are not being created.

add_action("gform_post_submission_8", "create_services_listing_entry", 10, 2);
function create_services_listing_entry($entry, $form){

    //getting post
    $postid = get_post($entry["post_id"]);

	//prepare the data for insertion into wp_postmeta
	$ecpt_whmcsservicesid = $entry[23];
	$ecpt_listingaddress = $entry[3];
	$ecpt_listingtown = $entry[4];
	$ecpt_listingpostcode = $entry[5];
	$ecpt_listingcountry = $entry[6];
	$ecpt_listingtel = $entry[7];
	$ecpt_listingemail= $entry[9];
	$ecpt_listingurl = $entry[9];
	$ecpt_listingmainbanner = $entry[18];
	$ecpt_listingkeywords = $entry[13];

	//insert data into wp_postmeta
	update_post_meta($postid, 'ecpt_whmcsservicesid', $ecpt_whmcsservicesid);
	update_post_meta($postid, 'ecpt_listingaddress', $ecpt_listingaddress);
	update_post_meta($postid, 'ecpt_listingtown', $ecpt_listingtown);
	update_post_meta($postid, 'ecpt_listingpostcode', $ecpt_listingpostcode);
	update_post_meta($postid, 'ecpt_listingcountry', $ecpt_listingcountry);
	update_post_meta($postid, 'ecpt_listingtel', $ecpt_listingtel);
	update_post_meta($postid, 'ecpt_listingemail', $ecpt_listingemail);
	update_post_meta($postid, 'ecpt_listingurl', $ecpt_listingurl);
	update_post_meta($postid, 'ecpt_listingmainbanner', $ecpt_listingmainbanner);
	update_post_meta($postid, 'ecpt_listingkeywords', $ecpt_listingkeywords);

}

Any ideas what I am doing wrong here?