Not able to give editors acess to new admin menu item

Question

I'm adding an extra menu item in admin menu by using add_menu_page.

add_menu_page('Calendar', 'Calendar', 'edit_posts', 'wp-eventcal/eventcal-manager.php');

Still my editors do not see the menu item. Why not? Any user that can edit a post, should now be able to see the menu item.

Update

This is the code:

  // Define some constants
  define('WP_CAL_PLUGIN_DIR', trailingslashit( str_replace("\\","/", dirname(__FILE__) ) ) );
  define('WP_CAL_PLUGIN_URL', trailingslashit( str_replace("\\","/", dirname(__FILE__) ) ) );


  // Plugin activation / deactivation script
  register_activation_hook(__FILE__,'event_cal_install');

  // create custom plugin settings menu
  if ( function_exists('add_action') ) {
    add_action('admin_menu', 'event_cal_menu');
    add_shortcode('eventcal', 'shortcode_display_event');
  }

function event_cal_menu() {
    //create new top-level menu
    add_menu_page('Calendar', 'Calendar', 'read', 'wp-eventcal/eventcal-manager.php');
}

Could it be admin_init in add_action that gives me problems?

Update 2
If I log in as administrator, I can see the menu item.

Answer 1

Must be a problem with the surrounding code, your add_menu_page code works fine inside my test code, i can see the item as an admin or editor.

add_action( 'admin_menu' , 'admin_menu_new_items' );
function admin_menu_new_items() {
    add_menu_page('Calendar', 'Calendar', 'edit_posts', 'wp-eventcal/eventcal-manager.php');
}

Works just fine for me..

Are you using any plugins for managing the admin menu, such as Adminize? Or alternatively using any CSS to hide elements in the menu? Only two reasons i could think it would be hidden(aside from a problem with surrounding code).