Undefined index: _noncename !wp_verify_nonce with meta box

Please help. The following two errors are generated while using my plugin with debug=true.
Notice: Undefined index: name in /Applications/XAMPP/xamppfiles/htdocs/wordpress2/wp-content/plugins/Employee/EmployeePostType.php on line 155

Notice: Undefined index: _noncename in /Applications/XAMPP/xamppfiles/htdocs/wordpress2/wp-content/plugins/Employee/EmployeePostType.php on line 155

/***************MY CODE ************************\

function save_postdata( $post_id ) {
global $post, $new_meta_boxes;

foreach($new_meta_boxes as $meta_box) {
	// Verify
		if ( !wp_verify_nonce( $_POST[$new_meta_box['name'].'_noncename'], plugin_basename(__FILE__) )){
				return $post_id;
			}
		if ( 'page' == $_POST['post_type'] ) {
			if ( !current_user_can( 'edit_page', $post_id ))
			return $post_id;
			} else {
			if ( !current_user_can( 'edit_post', $post_id ))
			return $post_id;
			}

			$data = $_POST[$meta_box['name']];

			if(get_post_meta($post_id, $meta_box['name']) == "")
			add_post_meta($post_id, $meta_box['name'], $data, true);
			elseif($data != get_post_meta($post_id, $meta_box['name'], true))
			update_post_meta($post_id, $meta_box['name'], $data);
			elseif($data == "")
			delete_post_meta($post_id, $meta_box['name'], get_post_meta($post_id, $meta_box['name'], true));
			}
		}
add_action('admin_menu', 'create_meta_box');
add_action('save_post', 'save_postdata');