XML-RPC to return userID from cookie

[eluser]duffy0[/eluser]
I am using XML-RPC to open my development environment for my friends to build on, but I can't get CI to return the user's id from a encrypted cookie.

The method is initializing, but only returns an empty array like this:

Array ( [userID] => )

Here is my code:

Code:

function getLoggedInUser() {
        /* Load the XML-RPC library and others. */
        $this->load->library('xmlrpc');
        $this->load->library('encrypt');

        /* Send Responce. */
        $cookie = $this->encrypt->decode($this->input->cookie('userID'));
        $response = array(
                            array(
                                    'userID' => array($cookie , 'string')
                                 ),
                            'struct'
                         );
        return $this->xmlrpc->send_response($response);
}

Am I missing something??