file mymodule.inc :

        $items['ajax/channel/%/get-program'] = array(
        'title' => t('get channel program by ID'),
        'type' => MENU_CALLBACK,
        'page callback' => 'get_channel_program',
        'page arguments' => array(2),
        'access arguments' => array('access content'),
      );
    
      return $items;
//channel program
function get_channel_program($channel_id){
  $channel_id = (isset($_POST['channel_id']) ? $_POST['channel_id'] : '');
  if (!is_numeric($channel_id)) :
    drupal_not_found();
  else :
    drupal_json_output($channel_id);
  endif;
}

file mudule.js :

Drupal.behaviors.ajaxProgram = {
        attach: function (context, settings) {

            // CSS Selector for the button which will trigger the AJAX call

            $('.channel-tv-tabs .tab .tabset .single-prog', context).click(function () {

                var channel_id = $(this).data('channel-id');

                $.ajax({
                    url: '/'+Drupal.settings.pathPrefix + 'ajax/channel/'+channel_id+'/get-program', // This is the AjAX URL set by the custom Module
                    type: "POST",
                    data: { channel_id : channel_id }, // Set the number of Li items requested
                    dataType: "json",          // Type of the content we're expecting in the response
                    success: function(data) {
                        var parsed_data = $.parseJSON(data);
                        console.log(parsed_data);  // Place AJAX content inside the ajax wrapper div
                    },
                    error: function(jqXHR, textStatus, errorThrown){
                        console.log(errorThrown);
                    }

                });

            });

        }
    };

Pls help me and tell what i do wrong?