functions.php will not work with child theme

Hi there, I am new to wordpress however I have made couple of child themes for different themes till now and every time I used this exact code (except changing the child theme name) in my functions.php and it worked. but now I have problem.
here is the code:

<?php
/**
* the functions file for the zokott child theme
*/

	function zokott_scripts(){
		{
			wp_enqueue_style( 'zokott-styles', get_stylesheet_directory_uri().'/zokott-style.css');
		}
		}

add_action('wp_enqueue_scripts' , 'zokott_scripts');

?>

and I also add this to my style.css file in my child theme:

/*

Theme Name: zokott
Description: child theme based on twentytwelve
Author: ZoKo
Version: 0.0.1
Template: twentytwelve

*/

@import url('../twentytwelve/style.css');

I really cannot figure it out after several hours searching the web.
can anyone here help me. thanks