Amfphp And Flex4.5 Very Simple Login System

I am trying to create a flex login screen and I am submitting my variables via amfphp and when I run this query I get no data returned.

When I pass the values ​​to the amfphp browser, I see that the string is being returned. Can someone explain what I am doing wrong, remember that I am a complete nob.

Errors I have:

(Object) # 0
  message = "faultCode: INVALID_AMF_MESSAGE faultString: 'Invalid AMF message' faultDetail: '' Lines: 1
  ''"
  name = "Error"
  rootCause = (null)

<?php
    require('connection.php');

    class NotWorking {

        private $dbc;

        public function __construct(){
            $this->dbc = @mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME) OR DIE (mysqli_connect_error() );
        }

        public function no ($someVar) {
            $data = array();
            $password = mysqli_real_escape_string($this->dbc,trim($someVar['password']));
            $email= mysqli_real_escape_string($this->dbc,trim($someVar['email']));
            $query = "SELECT * FROM users WHERE email='$email' AND password='$password'";
            $r= mysqli_query($this->dbc,$query);

            /*
            if($r){
                echo ' query works ';
                var_dump($r);
            }else{ 
                echo 'Does not work';
            }
            */

            $num = mysqli_num_rows($r);
            echo "'Rows: $num'";

            if ($num > 0 )
                while ($row = mysqli_fetch_array($r) ){
                    $data[] = $row;
                }
            return $data;
        }
    }