Error: Unable to determine connection method on a link!

[Goshawk]

Hi,

I am a newbie in programming and php.

I am writing my first mod for a shopping cart but when I oen the page I get this error:

 

Error!

Unable to determine connection method on a link!

Known methods: NONSSL SSL

Function used:

zen_href_link('new_sumner_order.php', 'customers_firstname customers_lastname

entry_street_address, entry_city, entry_postcode entry_state', '')

 

This is the referring part of the url:

../new_sumner_order.php?origin=sumner_shop_customers.php&mode=NONSSL&selected_box=tools&customer=Array&cID=473

 

And here is the code used:

$action = (isset($_GET['action']) ? $_GET['action'] : '');
$cID = (isset($_GET['cID']) ? (int)$_GET['cID'] : false);
if ($cID) {
    require_once (DIR_WS_CLASSES . 'new_sumner_order.php');
}
$error = false;
$processed = false;

  if ( ($action == 'get_customer_details') && isset($_POST['cID']) ) {
    $this_customer = get_customer_sql_query(zen_db_input($_POST['customers_id']), 'customer');
    $this_customer_details = $db->Execute($this_customer['query_string']);
    $this_customer_details_to = $this_customer['query_name'];
    if ($_POST['customer_details_to']) {
      $this_customer_details_to = zen_db_prepare_input($_POST['customer_details_to']);
    }
  
    // error message: if no customer selected
    // TODO: change to dropbox in popup window
    if (empty($this_customer_details_to)) {
      $messageStack->add_session(ERROR_NO_CUSTOMER_SELECTED, 'error');
      $_GET['action']='';
      zen_redirect(zen_href_link(FILENAME_NEW_SUMNER_ORDER));
    }
}

<tr><?php echo zen_draw_form('customer', FILENAME_NEW_SUMNER_ORDER,
zen_get_all_get_params(array('action')) . 'action=get_customer_details', 'post');
echo zen_hide_session_id(); ?>
      <td class="formAreaTitle"><?php echo CATEGORY_CUSTOMER; ?></td>
    </tr>
    <tr>
      <td class="formArea"><table border="0" cellspacing="2" cellpadding="2"></td>
</tr>
<tr>
      <td class="main"><?php echo CUSTOMER_DETAILS; ?></td>
      <td class="main">
  	<?php zen_draw_hidden_field($_GET['cID']);
	  echo zen_href_link(FILENAME_NEW_SUMNER_ORDER, 'customers_firstname' . ' ' . 'customers_lastname' . '<br />' . 'entry_street_address' . ', ' . 'entry_city' . ', ' . 'entry_postcode' . ' ' . 'entry_state', $this_customer, 'NONSSL'); ?>
  </td>

 

What have I done wrong?

 

Many thanks,

 

Goshawk