Drupal services node.save with Key auth

Question

When posting a node from my slavesite.com site to my hostsite.com site, it keeps giving me the error : "1 1 Invalid API key.." I checked the key I set up on the host site and I gave the key a method access of "node.save". I built a simple module I got from this site(http://thejibe.com/blog/10/8/saving-node-remotely-using-services-and-api-key-authentication) that displays a form that should send the data to the host(server) site. On the server site I have Use Keys checked, Expiry time set to 600, Use sessid unchecked, Apply Content Permissions unchecked. Here is my module code:

<?php

// Define the hostnames that we will be using.
define(SLAVE_HOSTNAME, 'myslavesite.com');
define(HOST_HOSTNAME, 'http://my.hostserver.com');

/*
 * Remote call functions so that we can connect to our Host.
 * @method - The name of the callmethod to use when retrieving/sending data. ex: "node.save"
 */
function remote_call($method = '') {
  // API Key.  Replace with your API key created in the previous step.
  $api_key = 'a8701f38cca293b29850cae4408fa788';

  // Remote services url.  Replace example.com with your drupal services site.
  $server = HOST_HOSTNAME . '/services/xmlrpc';

  // The domain you are sending the request from, which is specified also in the api key.
  $domain = SLAVE_HOSTNAME;

  // Timestamp for hash
  $timestamp = (string) time();

  // Single use password
  $nonce = user_password();

  // Create secure hash using your api key. This will be validated against the Host's.
  $hash = hash_hmac('sha256', $timestamp . ';' . $domain . ';' . $nonce . ';' . $method, $api_key);

  // Lets format our data in a pretty array() to pass on.
  $return = array(
    'server' => $server,
    'hash' => $hash,
    'domain' => $domain,
    'timestamp' => $timestamp,
    'nonce' => $nonce,
  );
  return $return;
}

/*
 * Remote talking. Formalize our data to send/receive to/from the Host.
 * @method - The name of the callmethod to use when retrieving/sending data. ex: "node.save"
 * @data - formalized expected data.
 */
function remote_talk($method = '', $data) {
  $values = remote_call($method);

  // Get a node from the remote server and pass in the required fields see: http://api.drupal.org/api/function/xmlrpc
  $xmlrpc_result = xmlrpc($values['server'], $method, $values['hash'], $values['domain'], $values['timestamp'], $values['nonce'], $data);

  if ($xmlrpc_result === FALSE) {
    return xmlrpc_error();
  }
  else {
    return $xmlrpc_result;
  }
}




/* 
 * Create issue form.
 */
function remote_create_form(&$node, $form_state = '') {

  // Title of the new node textfield.                                                            
  $form['title'] = array(
    '#type' => 'textfield',
    '#title' => t('Title'),
    '#required' => TRUE,
  );

  // Body of the new node textarea.
  $form['body'] = array(
    '#type' => 'textarea',
    '#title' => t('Description'),
    '#rows' => 10,
    '#required' => TRUE,
  );

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit'),
  );

  // Submit handler where we will pass on our submitted values to Host.
  $form['#submit'][] = 'remote_create_form_submit';
  return $form;  
} 


function remote_create_form_submit($form_values, $form_state) {

  // Formalize the node array.
  $node['title'] = $form_values['title']['#value']; // These are the values that have been passed on from the form submit.
  $node['body'] = $form_values['body']['#value']; // These are the values that have been passed on from the form submit.
  $node['type'] = 'page'; // a valid content type on Host.
  $node['created'] = time();
  $node['status'] = 1;
  $node['promote'] = 0;
  $node['sticky'] = 0;
  $node['format'] = 1;
  $node['name'] = 'eric'; // Note: We'll replace this with a valid username that resides on the Host site.

  // Create node obj to send through Services.
  $node = node_submit($node);

  // Send off to our XMLRPC call with the proper call method.
  $return = remote_talk('node.save', $node); 

  // Error reporting.
  if($return->is_error) {
    drupal_set_message(t('There was an error') . ': ' . t($return->message) . '.', 'error');
  } else {
    drupal_set_message(t('Thank you for your submission.'));
  }
}

thanks