Wordpress API - add new page through Code igniter XML-RPC

This is the code for adding the new page in my class:
class wordpress extends CI_xmlrpc{ 
...code for username etc.. 
function newPage($content){
		$this->method('wp.newPage');
		$request = array($this->blog_id, $this->username, $this->password, $content);
		$this->request($request); 
		if ( ! $this->send_request()){
			return $this->display_error();
		}
		else{
			return $this->display_response(); 
		}
	}
} 
This is the code for getting the data from the user: 
form_open('media/wordpressAdd','id="wordpressForm"').
                                 form_input('post[title]').
                                 form_textarea('post[description]').
                                 form_hidden('post[publish]','1').
                                 form_submit('publish', 'Publish').
                                 form_close(); 

This is the snippet of code for putting the posted data into the above function: 
if($this->input->post('post')){
            $worked=$this->wordpress->newPage($this->input->post('post'));
            print $worked;
            $page['page']['heading']="Page Published";
            $page['page']['content']="";
        } 

The response I get from Wordpress is:
Invalid post type.  
I suspect it is something to do with using the array got from the post and passing that in to wordpress (http://codex.wordpress.org/XML-RPC_wp#Parameters_16):