Upload_path error with justboil plugin in tinymce

See more:

PHP

TinyMCE

I am using tinymce with justboil plugin for image upload on local xampp server, but on selecting image it shows error
The upload path does not appear to be valid.

I have changed config file of justboil plugin to

$config['img_path'] = '/media'; // media is directory where i want to store images
$config['upload_path'] = $_SERVER['DOCUMENT_ROOT'] . $config['img_path'];

I tried changing $_SERVER['DOCUMENT_ROOT'] to $_SERVER['root'] and even to "C\xampp\htdocs\tutorials" as I am using local server but these all gave same error.