Я не могу получить данные формы сообщения из скрипта CodeIgniter

Я прочитал все посты по этой теме, которые нашел, и мне кажется, что ничего не помогает. Раньше он работал на предыдущем хосте, а не на этом новом. У меня такое ощущение, что это может быть проблема .htaccess. Сайт находится в собственном поддомене. http://test.domain.com

routes.php:

$route['default_controller'] = "calculator";
$route['404_override'] = '';

некоторые из формы:

<form action="index.php/calculator/calculate" method="post" id="calc_form" enctype="multipart/form-data;charset=utf-8">
<input name="span_length_ft" id="span_length_ft" type="text"/>ft
<input name="span_length_in" id="span_length_in" type="text"/>Inch

Контроллеры / calculator.php

class Calculator extends CI_Controller {


public function __construct()
{
parent::__construct();

$this->load->model('products_model');
$this->load->helper('form');

}

public function index(){

$deck_filters = $this->products_model->get_filters(FILTER_TYPE_DECK);
$sup_att_filters = $this->products_model->get_filters(FILTER_TYPE_SUP_ATT);
$side_att_filters = $this->products_model->get_filters(FILTER_TYPE_SIDE_ATT);
$gage_filters = $this->products_model->get_gages();
$sup_pattern_filters = $this->products_model->get_distinct_sup_patterns();
$side_spacing_filters = $this->products_model->get_distinct_side_spacings();
$thick_filters = array(
1 => '< 1/8"',
2 => '1/8"',
3 => '3/16"',
4 => '1/4"',
5 => '5/16"',
6 => '3/8"',
7 => '> 3/8"'
);

$this->load->view('header');
$this->load->view('calculator',array(
'deck_filters' => $deck_filters,
'sup_att_filters' => $sup_att_filters,
'side_att_filters' => $side_att_filters,
'gage_filters' => $gage_filters,
'sup_pattern_filters' => $sup_pattern_filters,
'side_spacing_filters' => $side_spacing_filters,
'thick_filters' => $thick_filters
));
$this->load->view('footer');
}

public function calculate(){

$this->load->library('form_validation');
$this->load->model('products_model');
$this->load->helper(array('form','url'));
$this->output->set_header("Pragma: no-cache");

var_dump($this->input->post());
var_dump($_POST);

if($this->_val_params()){

$span_length_ft = $this->input->post('span_length_ft',TRUE);
$span_length_in = $this->input->post('span_length_in',TRUE);
$nr_spans = $this->input->post('nr_spans',TRUE);
$req_shear = $this->input->post('req_shear',TRUE);
$max_flex = $this->input->post('max_flex',TRUE);
$req_vload = $this->input->post('req_vload',TRUE);
$labor_rate = $this->input->post('labor_rate',TRUE);
etc.. etc..
}
private function _val_params(){
$rules = array(
array(
'field'   => 'span_length_ft',
'label'   => 'Span Length (ft)',
'rules'   => 'trim|xss_clean|required|integer|callback_check_span_length'
),
array(
'field'   => 'span_length_in',
'label'   => 'Span Length (In)',
'rules'   => 'trim|xss_clean|integer'
),
array(
'field'   => 'nr_spans',
'label'   => 'Number of Spans',
'rules'   => 'trim|xss_clean|required|integer'
),
array(
'field'   => 'req_shear',
'label'   => 'Required Diaphragm Shear',
'rules'   => 'trim|xss_clean|required|numeric'
),
array(
'field'   => 'max_flex',
'label'   => 'Maximum Flexibility Factor',
'rules'   => 'trim|xss_clean|numeric'
),
array(
'field'   => 'req_vload',
'label'   => 'Maximum Flexibility Factor',
'rules'   => 'trim|xss_clean|numeric'
),
array(
'field'   => 'labor_rate',
'label'   => 'Labor Rate',
'rules'   => 'trim|xss_clean|required|numeric'
),

array(
'field'   => 'filter_deck[]',
'label'   => 'Deck filter',
'rules'   => 'trim|xss_clean|integer'
),

array(
'field'   => 'filter_gage[]',
'label'   => 'Gage filter',
'rules'   => 'trim|xss_clean|integer'
),

array(
'field'   => 'filter_sup_att[]',
'label'   => 'Support Attachment filter',
'rules'   => 'trim|xss_clean|integer'
),

array(
'field'   => 'filter_sup_pattern[]',
'label'   => 'Support Attachment Pattern filter',
'rules'   => 'trim|xss_clean|max_length[5]'
),

array(
'field'   => 'filter_thick[]',
'label'   => 'Support Thickness filter',
'rules'   => 'trim|xss_clean|integer'
),

array(
'field'   => 'filter_side_att[]',
'label'   => 'Sidelap Attachment filter',
'rules'   => 'trim|xss_clean|integer'
),

array(
'field'   => 'filter_side_spacing[]',
'label'   => 'Sidelap Attachment Spacing filter',
'rules'   => 'trim|xss_clean|integer'
)
);

$this->form_validation->set_rules($rules);

return $this->form_validation->run();
}

.Htaccess:

RewriteEngine on
RewriteCond $1 !^(index\.php|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]